Selections from Kreigh Tomaszewski's
Rock and Mineral Collection

Magnificent Obsessions Collection
Rockhounding A to Z

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)


The First Half of This Display and Even More From My Collection

or Return to Catalog Index




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; 4250-4499
Numerical Index; 4500-4749
Numerical Index; 5000-5249
Numerical Index; 5250-5499
Numerical Index; 6250-6499
Numerical Index; 8750-8999
Numerical Index; 12250-12499
Numerical Index; 12500-12749
Numerical Index; 13000-13249
Numerical Index; 80750-80999




Current date and time is Tuesday, 28-Mar-2017 00:15:33 EDT and the Greenwich date and time is Tuesday, 28-Mar-2017 04:15:33 GMT. You are viewing this page from 54.204.199.76 and are visitor number 78482. This page was first published on 1 September 1998 and was last updated on Thursday, 08-Sep-2005 23:01:43 EDT.


You can return to The Tomaszewski Family Public Home Page, or visit my personal homepage for more Rockhounding information, or check out my collection of links for rockhounds, or read about Labeling and Cataloging Rocks, Minerals, and Fossils, or review some field trip reports, or learn how to make your own lapidary equipment, or send me Email at Kreigh@Tomaszewski.net