Rocks and Minerals displayed at the Grand Rapids Public Museum on December 12, 1998 by Kreigh Tomaszewski as the 'Rocks and Minerals' part of the Museum's 'Magnificent Obsessions - Collecting A to Z' exhibit. I hope to have pictures of this group of specimens up soon.

Kreigh's 'Magnificent Obsessions' Collection
Rockhounding A to Z

Principal Mineral(s)	Formula		Locality	When Collected	Matrix	Secondary Mineral(s)	Comments	Reference	Hardness	Streak	Specific Gravity	Crystal Form(s)
Azurite	Cu3(OH)2(CO3)2	individual specimen picture not yet available this specimen may be included in the group pictures at the beginning and end of this section	Mexico	When Collected	Matrix	Secondary Mineral(s)	Named after the mineral's color by Robert Jameson in 1805; an earlier name was Blue Malachite.	Reference #0319	Hardness	Streak	Specific Gravity	Crystal Form(s)
Azurite	Cu3(OH)2(CO3)2	individual specimen picture not yet available this specimen may be included in the group pictures at the beginning and end of this section	Morenci, Arizona	When Collected	Matrix	Secondary Mineral(s)	Named after the mineral's color by Robert Jameson in 1805; an earlier name was Blue Malachite.	Reference #0455	Hardness	Streak	Specific Gravity	Crystal Form(s)
Agate (a variety of quartz)	SiO2	individual specimen picture not yet available this specimen may be included in the group pictures at the beginning and end of this section	Lake Superior Shoreline, Michigan	When Collected	Matrix	Secondary Mineral(s)	The earliest written record of this name id by the Greek scientist Theophrastus (376 - 287 BC); it was named because the stone was found near the river Achatesin in southern Sicily (called the Dirillo river today).	Reference #0452, #0453, #0454	Hardness	Streak	Specific Gravity	Crystal Form(s)
Aragonite with	CaCO3	individual specimen picture not yet available this specimen may be included in the group pictures at the beginning and end of this section	Placeros de Guadalupe, Mexico	acquired 1980s	Matrix	Novacekite	Named after the region of Aragon, Spain by Abraham Gottlob Werner in 1796.	Reference #0380	Hardness	Streak	Specific Gravity	Crystal Form(s)
Amethyst (a variety of quartz)	SiO2	individual specimen picture not yet available this specimen may be included in the group pictures at the beginning and end of this section	Locality	When Collected	Matrix	Secondary Mineral(s)	It was believed by the ancients to have special powers and was named from the Greek word amethustos meaning anti-intoxicant or not drunken.	#0224, #0225, #0226, #0227, #0228, #0229, #0230, #0231	Hardness	Streak	Specific Gravity	Crystal Form(s)
Barite	BaSO4	individual specimen picture not yet available this specimen may be included in the group pictures at the beginning and end of this section	El Solar mine (level 4) Taxco, Guerrero, Mexico	When Collected	Matrix	Secondary Mineral(s)	Named from the Greek word baros meaning weight or heavy by Dietrich Ludwig Gustav Karsten in 1800.	Reference #0381	Hardness	Streak	Specific Gravity	Crystal Form(s)
Barite Rose	Formula		Arizona	When Collected	Matrix	Secondary Mineral(s)	Barite was named from the Greek word baros meaning weight or heavy by Dietrich Ludwig Gustav Karsten in 1800. Rose since the sand crystal takes a shape like that flower.	Reference #0402, #0409	Hardness	Streak	Specific Gravity	Crystal Form(s)
Beryl (variety Aquamarine)	Be3Al2Si6O18	individual specimen picture not yet available this specimen may be included in the group pictures at the beginning and end of this section	Locality	acquired 1960s	Matrix	Secondary Mineral(s)	Named from the Greek word beryllos and is believed to refer to Belur, a town in Southern India near gem deposits. Historically it was applied to green gemstones in general; use is very limited now (by chemistry).	Reference #0392	Hardness	Streak	Specific Gravity	Crystal Form(s)
Biotite Mica	K(Mg,Fe)3AlSi3O10(OH)2		Locality	acquired 1960s	Matrix	Secondary Mineral(s)	Named in honor of French physicist Jean Baptiste Biot (who discovered different micas have different optical properties) by J.F.L. Hausmann in 1847.	Reference #0372, #0373	Hardness	Streak	Specific Gravity	Crystal Form(s)
Calcite (optical)	CaCO3	individual specimen picture not yet available this specimen may be included in the group pictures at the beginning and end of this section	Locality	acquired 1994	Matrix	Secondary Mineral(s)	Named from the Latin word calx which means burnt lime. First use of the name was probably by Johann Karl Freisleben on 1836, but first use as applied today was probably by E.J. Chapman in 1843.	Reference #0377, #0378, #0379	Hardness	Streak	Specific Gravity	Crystal Form(s)
Calcite	CaCO3	individual specimen picture not yet available this specimen may be included in the group pictures at the beginning and end of this section	Locality Lost	1960s	Limestone	Pyrargyrite, Pyrite	This was one of my early specimens and I bought it at a silent auction at a Grand Rapids Rock and Mineral Society club meeting. Named from the Latin word calx which means burnt lime. First use of the name was probably by Johann Karl Freisleben on 1836, but first use as applied today was probably by E.J. Chapman in 1843.	#0430	Hardness	Streak	Specific Gravity	Crystal Form(s)
Calcite	CaCO3	individual specimen picture not yet available this specimen may be included in the group pictures at the beginning and end of this section	Pugh Quarry, Ohio	acquired 1960s	Matrix	Secondary Mineral(s)	Named from the Latin word calx which means burnt lime. First use of the name was probably by Johann Karl Freisleben on 1836, but first use as applied today was probably by E.J. Chapman in 1843.	Reference #0429	Hardness	Streak	Specific Gravity	Crystal Form(s)
Calcite	CaCO3	individual specimen picture not yet available this specimen may be included in the group pictures at the beginning and end of this section	Quincy mine Houghton, Michigan	1996	Matrix	Secondary Mineral(s)	Named from the Latin word calx which means burnt lime. First use of the name was probably by Johann Karl Freisleben on 1836, but first use as applied today was probably by E.J. Chapman in 1843.	Reference #0308	Hardness	Streak	Specific Gravity	Crystal Form(s)
Calcite	CaCO3	individual specimen picture not yet available this specimen may be included in the group pictures at the beginning and end of this section	Riverside, Calafornia	When Collected	Matrix	Secondary Mineral(s)	Named from the Latin word calx which means burnt lime. First use of the name was probably by Johann Karl Freisleben on 1836, but first use as applied today was probably by E.J. Chapman in 1843.	Reference #0383	Hardness	Streak	Specific Gravity	Crystal Form(s)
White Celestite	SrSO4		Clay Center, Ohio	acquired 1960s	Matrix	Secondary Mineral(s)	The first specimens found were pale blue and were named after the Latin word coelestis meaning heaven or sky by Abraham Gottlob Werner in 1798.	Reference #0421	Hardness	Streak	Specific Gravity	Crystal Form(s)
Blue Celestite	SrSO4	individual specimen picture not yet available this specimen may be included in the group pictures at the beginning and end of this section	Clay Center, Ohio	acquired 1960s	Matrix	Secondary Mineral(s)	The first specimens found were pale blue and were named after the Latin word coelestis meaning heaven or sky by Abraham Gottlob Werner in 1798.	Reference #0451	Hardness	Streak	Specific Gravity	Crystal Form(s)
Chalk (a variety of limestone)	CaCO3		Dover, England	acquired 1970s	Matrix	Secondary Mineral(s)	From the well known White Cliffs of Dover; a Christmas Gift from a British pen-pal my Mother kept throughout her life.	Reference #0360	Hardness	Streak	Specific Gravity	Crystal Form(s)
Chalcopyrite and Hematite	CuFeS2 and Fe2O3	individual specimen picture not yet available this specimen may be included in the group pictures at the beginning and end of this section	Iron Bridge, Ontario, Canada	1981	Calcite	Secondary Mineral(s)	Chalcopyrite was named from two Greek words, chalcos meaning copper or brass, and pyr meaning fire, by Johann Friedrich Henckel in 1725; it contained copper, but struck a spark with steel like pyrite. This large specimen sits next to my fireplace	Reference #0450	Hardness	Streak	Specific Gravity	Crystal Form(s)
Corundum	Al2O3		Locality	acquired 1970s	Matrix	Calcite	There are several unceretain candidates for this name, but it was first formally applied to this mineral by Anton Estner in 1795.	Reference #0390	Hardness	Streak	Specific Gravity	Crystal Form(s)
Dunite (a variety of Olivine)	(Mg,Fe)2SiO4	individual specimen picture not yet available this specimen may be included in the group pictures at the beginning and end of this section	Quincy mine Houghton, Michigan	1996	Matrix	Secondary Mineral(s)	Comments	Reference #0317, #0318	Hardness	Streak	Specific Gravity	Crystal Form(s)
Datolite (variety porcelain)	Ca2B2(SiO4)2(OH)	individual specimen picture not yet available this specimen may be included in the group pictures at the beginning and end of this section	Michigan	acquired 1996	Matrix	Secondary Mineral(s)	Named after the Greek words datysthai meaning to devide, and lithos meaning stone, by Jens Esmark in 1805.	Reference #CC 37	Hardness	Streak	Specific Gravity	Crystal Form(s)
DogTooth Spar Calcite	CaCO3		Joplin, Missouri	acquired 1960s	Matrix	Secondary Mineral(s)	Calcite was named from the Latin word calx which means burnt lime. First use of the name was probably by Johann Karl Freisleben on 1836, but first use as applied today was probably by E.J. Chapman in 1843.	Reference #0361	Hardness	Streak	Specific Gravity	Crystal Form(s)
Enargite	Cu2AsS4	individual specimen picture not yet available this specimen may be included in the group pictures at the beginning and end of this section	Hancock, Michigan	1997	Matrix	Secondary Mineral(s)	Named from the Greek word enarge meaning distinct or apparent by Friedrich A. Breithaupt in 1850.	Reference #0448, #0449, #0477, #0478, #0479	Hardness	Streak	Specific Gravity	Crystal Form(s)
Fluorite Crystals	CaF2		Lafarge quarry Niagra Falls, New York	When Collected	Matrix	Secondary Mineral(s)	Name derived from the Latin verb fluere meaning to flow (it melts easily) by Georg Agricola in 1546.	Reference #0410, #0411, #0412	Hardness	Streak	Specific Gravity	Crystal Form(s)
Fluorite	CaF2	individual specimen picture not yet available this specimen may be included in the group pictures at the beginning and end of this section	Macomb, New York	When Collected	Matrix	Secondary Mineral(s)	Name derived from the Latin verb fluere meaning to flow (it melts easily) by Georg Agricola in 1546.	Reference #0476	Hardness	Streak	Specific Gravity	Crystal Form(s)
Fluorite (variety Blue John)	CaF2	individual specimen picture not yet available this specimen may be included in the group pictures at the beginning and end of this section	Derbyshire, England	acquired 1980s	Matrix	Secondary Mineral(s)	Name derived from the Latin verb fluere meaning to flow (it melts easily) by Georg Agricola in 1546. Blue John was in general use as a term for fluorite when the name was established, but properly refers only to the variety of fluorite found at Derbyshire.	Reference #60P	Hardness	Streak	Specific Gravity	Crystal Form(s)
Feldspar (variety orthoclase)	KAlSi3O8	individual specimen picture not yet available this specimen may be included in the group pictures at the beginning and end of this section	Locality	When Collected	Matrix	Secondary Mineral(s)	Probably named as a contraction of the common name of Fieldspar by Johan Gottschalk Wallerius in 1747.	Reference #0292	Hardness	Streak	Specific Gravity	Crystal Form(s)
Feldspar (Amazonestone, or Amazonite, variety microcline)	KAlSi3O8	individual specimen picture not yet available this specimen may be included in the group pictures at the beginning and end of this section	Colorado	acquired 1979	Matrix	Secondary Mineral(s)	Feldspar was probably named as a contraction of the common name of Fieldspar by Johan Gottschalk Wallerius in 1747. Amazonite was named after the Amazon River in Brasil by Friedrich A. Breithaupt in 1847.	Reference #0323, #0397, #0475	Hardness	Streak	Specific Gravity	Crystal Form(s)
Gypsum	CaSO4 2H2O		Alabastine mine Grand Rapids, Michigan	1988	Matrix	Secondary Mineral(s)	Probably named for the Greek word gypsos meaning plaster. Gypsum mining in Grand Rapids started in the spring of 1843 when Richard E. Butterworth uncovered a layer of it while plowing. This turned into the Grand Rapids Gypsum Co. in 1860 (and bought by Domtar Industries Inc. in 1981), which is the oldest continuously operating gypsum mine in in the world. The Alabastine mine was a competetor who's output was used to make sparkling/glittering alabastine paint.	Reference #0314, #0346, #0474	Hardness	Streak	Specific Gravity	Crystal Form(s)
Galena	PbS	individual specimen picture not yet available this specimen may be included in the group pictures at the beginning and end of this section	Joplin, Missouri	acquired 1997	Matrix	Dolomite	The Latin word galena means lead ore.	Reference #0293, #0294	Hardness	Streak	Specific Gravity	Crystal Form(s)
Graphite	C		Seathwaite mine Borroudale, Cumbria, England	acquired 1997	Matrix	Secondary Mineral(s)	The Seathwaite mine supplied the first ever pencil factory in Keswick, England. It was named from the Greek verb graphein meaning to write by Abraham Gottlob Werner in 1789.	Reference #0365	Hardness	Streak	Specific Gravity	Crystal Form(s)
Graphite	C	individual specimen picture not yet available this specimen may be included in the group pictures at the beginning and end of this section	Ticonderoga, New York	acquired 1950s	Matrix	Secondary Mineral(s)	Named from the Greek verb graphein meaning to write by Abraham Gottlob Werner in 1789.	Reference #0311	Hardness	Streak	Specific Gravity	Crystal Form(s)
Geode - Amethyst	Formula		South Dakota	acquired 1960s	Matrix	Secondary Mineral(s)	Comments	Reference #0394	Hardness	Streak	Specific Gravity	Crystal Form(s)
Geode	Formula	individual specimen picture not yet available this specimen may be included in the group pictures at the beginning and end of this section	Dale Hollow, TN	probably 1930s, acquired 1960s	Matrix	Secondary Mineral(s)	Comments	Reference #0325, #0326	Hardness	Streak	Specific Gravity	Crystal Form(s)
Geode	Formula	individual specimen picture not yet available this specimen may be included in the group pictures at the beginning and end of this section	Sheffler mine Illinois	When Collected	Matrix	Secondary Mineral(s)	Comments	Reference #0307	Hardness	Streak	Specific Gravity	Crystal Form(s)
Hematite	Fe2O3	individual specimen picture not yet available this specimen may be included in the group pictures at the beginning and end of this section	Locality	When Collected	Matrix	Secondary Mineral(s)	Comments	Reference #0337, #0338, #0339, #0336, #0367	Hardness	Streak	Specific Gravity	Crystal Form(s)
Hedenbergite	CaFeSi2O6		Locality	acquired 1980s	Matrix	Secondary Mineral(s)	Comments	Reference #0295	Hardness	Streak	Specific Gravity	Crystal Form(s)
Halite	NaCl	individual specimen picture not yet available this specimen may be included in the group pictures at the beginning and end of this section	Detroit, Michigan	acquired 1980	Matrix	Secondary Mineral(s)	Comments	Reference #0473	Hardness	Streak	Specific Gravity	Crystal Form(s)
Indian Pipestone (Hematite Sandstone)	Fe2O3	individual specimen picture not yet available this specimen may be included in the group pictures at the beginning and end of this section	Pipestone, MN	acquired 1960s	Matrix	Secondary Mineral(s)	Comments	Reference #0382	Hardness	Streak	Specific Gravity	Crystal Form(s)
Igneous Rocks	formed at high temperatures or from molten materials	individual specimen picture not yet available this specimen may be included in the group pictures at the beginning and end of this section	Locality	When Collected	Matrix	Secondary Mineral(s)	Comments	Reference	Hardness	Streak	Specific Gravity	Crystal Form(s)
Jasper (a variety of Quartz)	SiO2	individual specimen picture not yet available this specimen may be included in the group pictures at the beginning and end of this section	Drummond Island, Michigan	1967	Matrix	Secondary Mineral(s)	Comments	Reference #0431	Hardness	Streak	Specific Gravity	Crystal Form(s)
Kernite	Na2B4O7 4H2O	individual specimen picture not yet available this specimen may be included in the group pictures at the beginning and end of this section	Locality	When Collected	Matrix	Secondary Mineral(s)	Comments	Reference #0472	Hardness	Streak	Specific Gravity	Crystal Form(s)
Kona Dolamite	CaMg(CO3)2		Locality	acquired 1960	Matrix	Secondary Mineral(s)	Comments	Reference #0471	Hardness	Streak	Specific Gravity	Crystal Form(s)
Lazurite	Na4-5Al3Si3O12S	individual specimen picture not yet available this specimen may be included in the group pictures at the beginning and end of this section	Afghanistan	acquired 1978	Matrix	Secondary Mineral(s)	Comments	Reference #0310, #0428	Hardness	Streak	Specific Gravity	Crystal Form(s)
Lodestone (Magnetite)	Fe3O4	individual specimen picture not yet available this specimen may be included in the group pictures at the beginning and end of this section	Locality	When Collected	Matrix	Secondary Mineral(s)	Comments	Reference #0407	Hardness	Streak	Specific Gravity	Crystal Form(s)
Lepidolite	K2Li3Al4Si7O21(OH,F)3	individual specimen picture not yet available this specimen may be included in the group pictures at the beginning and end of this section	Brasil	acquired 1997	Matrix	Secondary Mineral(s)	Comments	Reference #0396	Hardness	Streak	Specific Gravity	Crystal Form(s)
Muscovite Mica	KAl3Si3O10(OH)2	individual specimen picture not yet available this specimen may be included in the group pictures at the beginning and end of this section	Mount Mica, Maine	acquired 1960s	Matrix	Green Tourmaline	Comments	Reference #0422, #0423, #0424	Hardness	Streak	Specific Gravity	Crystal Form(s)
Meteorite	Fe	individual specimen picture not yet available this specimen may be included in the group pictures at the beginning and end of this section	Meteor Crater, AZ	When Collected	Matrix	Secondary Mineral(s)	Comments	Reference #0359	Hardness	Streak	Specific Gravity	Crystal Form(s)
Marcasite	FeS2		Locality	When Collected	Matrix	Secondary Mineral(s)	Comments	Reference #0376	Hardness	Streak	Specific Gravity	Crystal Form(s)
Metamorphic rocks	altered by heat, pressure, and/or chemical action	individual specimen picture not yet available this specimen may be included in the group pictures at the beginning and end of this section	Locality	When Collected	Matrix	Secondary Mineral(s)	Comments	Reference	Hardness	Streak	Specific Gravity	Crystal Form(s)
Principal Mineral(s)	Formula		Locality	When Collected	Matrix	Secondary Mineral(s)	Comments	Reference	Hardness	Streak	Specific Gravity	Crystal Form(s)

Someday I hope to have my entire collection posted here. Until then, I hope you enjoy what I have posted so far. Come back again as I plan to update my catalog pages monthly.

Page A: Magnificent Obsessions Collection

Page B: Magnificent Obsessions Collection

Index by Mineral Name

Index by Mineral Type

Native Elements

Sulfides, Arsenides, Tellurides

Oxides

Halides

Carbonates

Nitrates and Borates

Sulfates

Phosphates, Arsenates, Vanadates, Chromates, and Uranates

Tungstates, Wolframates, and Molybdates

Silica Group (open network)

Tectosilicates (framework structures)

Phyllosilicates (sheet structures from sharing three oxygen)

Inosilicates (chain silicates)

Cyclosilicates (a ring structure)

Sorosilicates (two tetrahedra share one oxygen)

Nesosilicates (no direct sharing between tetrahedra)

Complex Silicates (share two or more of the other forms)

Organic and Odd/Exception Minerals

Numerical Index; 0000-0249

Numerical Index; 0250-0449

Numerical Index; 0500-0749

Numerical Index; 0750-0999

Numerical Index; 1000-1249

Numerical Index; 1250-1499

Numerical Index; 1500-1749

Numerical Index; 1750-1999

Numerical Index; 2000-2249

Numerical Index; 2250-2499

Numerical Index; 2500-2749

Numerical Index; 2750-2999

Numerical Index; 3000-3249

Numerical Index; 3250-3499

Numerical Index; 3500-3749

Numerical Index; 3750-3999

Numerical Index; 4000-4249

Numerical Index; 4250-4499

Numerical Index; 4500-4749

Numerical Index; 5000-5249

Numerical Index; 5250-5499

Numerical Index; 6250-6499

Numerical Index; 8750-8999

Numerical Index; 9750-9999

Numerical Index; 12250-12499

Numerical Index; 12500-12749

Numerical Index; 13000-13249

Numerical Index; 80750-80999

Current date and time is Thursday, 21-Nov-2024 05:04:25 EST and the Greenwich date and time is Thursday, 21-Nov-2024 10:04:25 GMT. You are viewing this page from 3.145.61.199 and are visitor number 25410. This page was first published on 1 September 1998 and was last updated on Friday, 02-Sep-2022 18:42:17 EDT.