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)
Native Copper	Cu	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	1997	Calcite vein	Secondary Mineral(s)	Comments	Reference #0470	Hardness	Streak	Specific Gravity	Crystal Form(s)
Native Silver on Copper	Ag, Cu	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	acquired 1998	none	Calcite	Comments	Reference #0374	Hardness	Streak	Specific Gravity	Crystal Form(s)
Olivene	(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	Locality	When Collected	Matrix	Secondary Mineral(s)	Comments	Reference #0469	Hardness	Streak	Specific Gravity	Crystal Form(s)
Opal	SiO2 nH2O (H2O up to 10%)	individual specimen picture not yet available this specimen may be included in the group pictures at the beginning and end of this section	Australia	When Collected	Matrix	Secondary Mineral(s)	Comments	Reference #0332, #0333, #0334	Hardness	Streak	Specific Gravity	Crystal Form(s)
Orpiment with Realgar	As2S3	individual specimen picture not yet available this specimen may be included in the group pictures at the beginning and end of this section	Getchel mine, Nevada	When Collected	Matrix	Secondary Mineral(s)	Comments	Reference #0354	Hardness	Streak	Specific Gravity	Crystal Form(s)
Obsidian	35% Quartz, 63% Feldspars, 2% ferromagnesian minerals	individual specimen picture not yet available this specimen may be included in the group pictures at the beginning and end of this section	Hawaii	When Collected	Matrix	Secondary Mineral(s)	The name Obsidian is due to a printer's error; it comes from Latin, Obsidianus, but really should have been Obsianus (according to Pliny) - pertaining to Obsius, the discoverer of a similar mineral in Ethiopa.	Reference #0468	Hardness	Streak	Specific Gravity	Crystal Form(s)
Obsidian	35% Quartz, 63% Feldspars, 2% ferromagnesian minerals	individual specimen picture not yet available this specimen may be included in the group pictures at the beginning and end of this section	Oregon	When Collected	Matrix	Secondary Mineral(s)	The name Obsidian is due to a printer's error; it comes from Latin, Obsidianus, but really should have been Obsianus (according to Pliny) - pertaining to Obsius, the discoverer of a similar mineral in Ethiopa.	Reference #0384	Hardness	Streak	Specific Gravity	Crystal Form(s)
Pyrite	FeS2		Casapulca, Peru	When Collected	Matrix	Secondary Mineral(s)	Comments	Reference #0427	Hardness	Streak	Specific Gravity	Crystal Form(s)
Pyrite in Bornite	FeS2		Iron Bridge, Ontario, Canada	1981	Matrix	Secondary Mineral(s)	Comments	Reference #0316	Hardness	Streak	Specific Gravity	Crystal Form(s)
Pyrite	FeS2		Arizona	1950s	Matrix	Secondary Mineral(s)	Comments	Reference #0465, #0466, #0467	Hardness	Streak	Specific Gravity	Crystal Form(s)
Pyrite	FeS2		Sparta, IL	acquired 1996	Matrix	Secondary Mineral(s)	Sunstone crystals of pyrite may be fossilized meteorite remains, chemically altered, and growth constrained to a plane surface by the coal layers they are found in.	Reference #0340, #0341	Hardness	Streak	Specific Gravity	Crystal Form(s)
Petoskey Stone Fossil (full colony)	Prismatophyllum or Hexagonaria, depending on which book or expert you prefer		Petoskey, Michigan	1963	none	Secondary Mineral(s)	gift from Mr. Gerald Morris, the Petoskey Stone Man, who was responsible for making the Petoskey Stone the State Stone of Michigan;	Reference #0464	Hardness	Streak	Specific Gravity	Crystal Form(s)
Pyrolusite	MnO2	individual specimen picture not yet available this specimen may be included in the group pictures at the beginning and end of this section	Aouli, Morocco	acquired 1996	Matrix	Secondary Mineral(s)	Specimen broken when dropped by a second grader, and this occurred two different times.	Reference #0233, #0219, #0220	Hardness	Streak	Specific Gravity	Crystal Form(s)
Pyrolusite	MnO2	individual specimen picture not yet available this specimen may be included in the group pictures at the beginning and end of this section	Jackson mine, Michigan	acquired 1960s	Matrix	Secondary Mineral(s)	Comments	Reference #0398	Hardness	Streak	Specific Gravity	Crystal Form(s)
Pentlandite	(Fe,Ni)2 nS	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	Matrix	Secondary Mineral(s)	Comments	Reference #0494	Hardness	Streak	Specific Gravity	Crystal Form(s)
Quartzite	SiO2	individual specimen picture not yet available this specimen may be included in the group pictures at the beginning and end of this section	Yankee Springs, Michigan	1988	Matrix	Secondary Mineral(s)	Comments	Reference #0492, #0493	Hardness	Streak	Specific Gravity	Crystal Form(s)
Quartz	SiO2		Brasil	acquired 1978	Matrix	Secondary Mineral(s)	Comments	Reference #0420	Hardness	Streak	Specific Gravity	Crystal Form(s)
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	Arkansas	acquired 1960s	Matrix	Secondary Mineral(s)	Comments	Reference #0312, #0313	Hardness	Streak	Specific Gravity	Crystal Form(s)
Riebeikite	Na2Fe32+Fe23+Si8O22(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	Locality	acquired 1950's	Matrix	Secondary Mineral(s)	Comments	Reference #0408	Hardness	Streak	Specific Gravity	Crystal Form(s)
Rose 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	New York	acquired 1970s	Quartz	micro fibers of dumortierite [Al3(BO3)(SiO4)3O3] give Rose Quartz its color and prevents the formation of crystals.	Comments	Reference #0389	Hardness	Streak	Specific Gravity	Crystal Form(s)
Realgar	AsS	individual specimen picture not yet available this specimen may be included in the group pictures at the beginning and end of this section	Nevada	acquired 1997	Matrix	Secondary Mineral(s)	Comments	Reference #0426	Hardness	Streak	Specific Gravity	Crystal Form(s)
Sand Calcite Crystals	Formula		South Dakota	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 #0491	Hardness	Streak	Specific Gravity	Crystal Form(s)
Serpentine (var. Chrysotile)	Mg3Si2O5(OH)4	individual specimen picture not yet available this specimen may be included in the group pictures at the beginning and end of this section	Ropes Gold Mine Ishpeming, Michigan	acquired 1997	Matrix	Secondary Mineral(s)	Comments	Reference #0309	Hardness	Streak	Specific Gravity	Crystal Form(s)
Serpentine	Mg3Si2O5(OH)4	individual specimen picture not yet available this specimen may be included in the group pictures at the beginning and end of this section	Lake Valhalla, Montville, NJ	1993	Matrix	Secondary Mineral(s)	Comments	Reference #0393	Hardness	Streak	Specific Gravity	Crystal Form(s)
Sulphur	S	individual specimen picture not yet available this specimen may be included in the group pictures at the beginning and end of this section	Baja California, Mexico	acquired 1998	Matrix	Secondary Mineral(s)	Comments	Reference #0418	Hardness	Streak	Specific Gravity	Crystal Form(s)
Selenite (a variety of gypsum)	CaSO4 2H20		Michigan Natural Storage Co mine Grand Rapids, Michigan	1988	Matrix	Secondary Mineral(s)	Gypsum was 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 #0488, #0489, #0490	Hardness	Streak	Specific Gravity	Crystal Form(s)
Sedementary Rocks	formed by the actions of water, wind, and/or organic agents	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)
Talc	Mg2Si4O10(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	Alaska	When Collected	Matrix	Secondary Mineral(s)	Comments	Reference #0352, #0353	Hardness	Streak	Specific Gravity	Crystal Form(s)
Tektite	Formula	individual specimen picture not yet available this specimen may be included in the group pictures at the beginning and end of this section	Indonesia	acquired 1997	Matrix	Secondary Mineral(s)	Comments	Reference #0375	Hardness	Streak	Specific Gravity	Crystal Form(s)
Tourmaline	Green Na(Al,Fe,Li,Mg)3B3Al3(Al3Si6O27)(O,OH,F)4 White CaMg3B3Al3(Al3Si6O27)(O,OH,F)4 Black NaFe3B3Al3(Al3Si6O27)(O,OH,F)4 Brown NaMg3B3Al3(Al3Si6O27)(O,OH,F)4	individual specimen picture not yet available this specimen may be included in the group pictures at the beginning and end of this section	Mt. Mica, Maine	acquired 1960s	Matrix	Secondary Mineral(s)	Comments	Reference #0315	Hardness	Streak	Specific Gravity	Crystal Form(s)
Tourmaline	White CaMg3B3Al3(Al3Si6O27)(O,OH,F)4 Black NaFe3B3Al3(Al3Si6O27)(O,OH,F)4	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 1950s	Matrix	Secondary Mineral(s)	Comments	Reference #0363	Hardness	Streak	Specific Gravity	Crystal Form(s)
Ulexite	NaCaB5O9 8H2O	individual specimen picture not yet available this specimen may be included in the group pictures at the beginning and end of this section	Death Valley, California	acquired 1993		Cut and polished ends showing TV-Stone effect.	Named this mineral in 1850 by James Dwight Dana after George Ludwig Ulex (1811-1833), the German chemist who discovered the mineral.	Reference #0205, #0364	2 1/2	white	1.9	Acicular
Vesuvanite	Ca10Al4(Mg,Fe)2Si9O34(OH)4		Mexico	acquired 1996	Matrix	Secondary Mineral(s)	Comments	Reference #0366	Hardness	Streak	Specific Gravity	Crystal Form(s)
Wavelite	Al3(OH)3(PO4)2 5H2O	individual specimen picture not yet available this specimen may be included in the group pictures at the beginning and end of this section	Arkansas	When Collected	Matrix	Secondary Mineral(s)	Comments	Reference #00357, #0358	Hardness	Streak	Specific Gravity	Crystal Form(s)
X - The classic unknown variable.	Can you help me identify this stone?	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 #082	Hardness	Streak	Specific Gravity	Crystal Form(s)
X - The classic unknown variable.	Can you help me identify this stone?	individual specimen picture not yet available this specimen may be included in the group pictures at the beginning and end of this section	Porcupine Mts, Michigan	1988	Matrix	Secondary Mineral(s)	Comments	Reference #083	Hardness	Streak	Specific Gravity	Crystal Form(s)
X - The classic unknown variable.	Can you help me identify this stone?		Houghton, Michigan	1997	Matrix	Secondary Mineral(s)	This was finally identified in 2001 as microscopic copper in datolite	Reference #084	Hardness	Streak	Specific Gravity	Crystal Form(s)
X - The classic unknown variable.	Can you help me identify this stone?	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	Matrix	Secondary Mineral(s)	Comments	Reference #085	Hardness	Streak	Specific Gravity	Crystal Form(s)
You can collect Rocks and Minerals too	Here are some of the things that will help	Sure, take your camera	Anywhere you have permission	Anytime	egg cartons (great for storing rocks-labels in lid)	the Internet - search on Rockhound black light	Knapsack Rock Hammer, chisel, and Safety Glasses Streak Plate (unglazed ceramic tile) hardness testing kit magnifier Guidebooks notepad and pencil newspaper	a local rock club (information subject to change): Holland - TULIP CITY GEM & MINERAL CLUB 579 W. 29th St. (49423) Meeting.: 4th Wedsnesday, 7:00 pm (Sept.-June) Holland Civic Center Kalamazoo - KALAMAZOO GEOLOGICAL & SOCIETY 206 E. Vienna St., Schoolcraft, MI 49087 Meetings: lst Wednesday, 7:30 pm (Sept.-June) KALAMAZOO County Center Bldg. Fairgrounds, Lake St Lansing - CENTRAL MI LAPIDARY & MINERAL SOCIETY 1407 Costs Grove, Hastings, MI 49058 Meetings: 3rd Thursday, 7:30 pm North School, 333 E. Miller Rd. Muskegon - MUSKEGON ROCK & MINERAL ASSOC. 602 Fleming (49445) Meetings: 4th Monday, 7:30 pm (Except Dec.) McGraft Park Community Bldg. Wyoming - INDIAN MOUNDS ROCK & MINERAL CLUB	Its not hard to join a club
Zeolites: Heulandite	(Ca,Na,K)6Al10(Al,Si)Si29O80 25H2O	individual specimen picture not yet available this specimen may be included in the group pictures at the beginning and end of this section	India	acquired 1998	Matrix	Secondary Mineral(s)	Comments	Reference #0362	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 07:44:04 EST and the Greenwich date and time is Thursday, 21-Nov-2024 12:44:04 GMT. You are viewing this page from 3.144.40.216 and are visitor number 493. This page was first published on 1 September 1998 and was last updated on Friday, 02-Sep-2022 18:42:16 EDT.