Azurite
Cu3(OH)2(CO3)2
Mexico
Azurite
Cu3(OH)2(CO3)2
Morenci, Arizona
Agate (a variety of quartz)
SiO2
Lake Superior Shoreline, Michigan
Aragonite with Novacekite
CaCO3
Placeros de Guadalupe, Mexico
Amethyst (a variety of quartz)
SiO2
Barite Rose
Barite
BaSO4
El Solar mine (level 4)
Taxco, Guerrero, Mexico
Beryl (variety Aquamarine)
Be3Al2Si6O18
Biotite Mica
K(Mg,Fe)3AlSi3O10(OH)2
Calcite (optical)
CaCO3
Calcite
CaCO3
Calcite
CaCO3
Pugh Quarry, Ohio
Calcite
CaCO3
Quincy mine
Houghton, Michigan
Calcite
CaCO3
Riverside, Calafornia
Celestite
SrSO4
Clay Center, Ohio
Blue Celestite
SrSO4
Clay Center, Ohio
Chalk (a variety of limestone)
CaCO3
Dover, England
Chalcopyrite and Hematite in Calcite
CuFeS2
Iron Bridge, Ontario, Canada
Corundum
Al2O3
Dunite (a variety of Olivine)
(Mg,Fe)2SiO4
Quincy mine
Houghton, Michigan
Datolite (variety porcelain)
Ca2B2(SiO4)2(OH)
Michigan
DogTooth Spar Calcite
CaCO3
Joplin, Missouri
Enargite
Cu2AsS4
Hancock, Michigan
Fluorite Crystals
CaF2
Lafarge quarry
Niagra Falls, New York
Fluorite
CaF2
Macomb, New York
Fluorite (variety Blue John)
CaF2
Derbyshire, England
Feldspar (variety orthoclase)
KAlSi3O8
Feldspar (Amazonestone, variety microcline)
KAlSi3O8
Colorado
Gypsum
CaSO4 2H2O
Michigan Natural Storage Co mine
Grand Rapids, Michigan
Galena and Dolomite
PbS
Joplin, Missouri
Graphite
C
Seathwaite mine
Borroudale, Cumbria, England
The Seathwaite mine supplied the first pencil factory in Keswick, England
Graphite
C
Ticonderoga, New York
Geode - Amethyst
South Dakota
Geode
Dale Hollow, TN
Geode
Sheffler mine
Illinois
Hematite
Fe2O3
Hedenbergite
CaFeSi2O6
Halite
NaCl
Detroit, Michigan
Indian Pipestone (Hematite Sandstone)
Pipestone, MN
Igneous Rocks are formed at high temperatures or from molten materials.
Jasper (a variety of Quartz)
SiO2
Drummond Island, Michigan
Kernite
Na2B4O7 4H2O
Kona Dolamite
CaMg(CO3)2
Lazurite
Na4-5Al3Si3O12S
Afghanistan
Lodestone (Magnetite)
Fe3O4
Lepidolite
K2Li3Al4Si7O21(OH,F)3
Brasil
Muscovite Mica
KAl3Si3O10(OH)2
Meteorite
Fe
Meteor Crater, AZ
Marcasite
FeS2
Metamorphic rocks have been altered by heat, pressure, and/or chemical action.
Native Copper
Cu
Quincy mine
Houghton, Michigan
Native Silver on Copper
Ag
Quincy mine
Houghton, Michigan
Olivene
(Mg,Fe)2SiO4
Opal
SiO2 nH2O (H2O up to 10%)
Australia
Orpiment with Realgar
As2S3
Getchel mine, Nevada
Obsidian
(35% Quartz, 63% Feldspars, 2% ferromagnesian minerals)
Hawaii
The name Obsidian is due to a printer's error; it comes from Latin, Obsidianus, but really should have been Obsianus, pertaining to Obsius (according to Pliny), the discoverer of a similar mineral in Ethiopa.
Obsidian
(35% Quartz, 63% Feldspars, 2% ferromagnesian minerals)
Oregon
The name Obsidian is due to a printer's error; it comes from Latin, Obsidianus, but really should have been Obsianus, pertaining to Obsius (according to Pliny), the discoverer of a similar mineral in Ethiopa.
Pyrite
FeS2
Casapulca, Peru
Pyrite in Bornite
FeS2
Iron Bridge, Ontario, Canada
Pyrite
FeS2
Arizona
Pyrite
FeS2
Sparta, IL
Petoskey Stone Fossil (full colony)
Prismatophyllum or Hexagonaria, depending on which book or expert you prefer
Petoskey, Michigan
Pyrolusite
MnO2
Aouli, Morocco
Pyrolusite
MnO2
Jackson mine, Michigan
Pentlandite
(Fe,Ni)2 nS
Iron Bridge, Ontario, Canada
Quartzite
SiO2
Yankee Springs, Michigan
Quartz
SiO2
Brasil
Quartz
SiO2
Arkansas
Riebeikite
Na2Fe32+Fe23+Si8O22(OH)2
Arizona
Rose Quartz
SiO2
Realgar
AsS
Nevada
Sand Calcite Crystals
South Dakota
Serpentine (var. Chrysotile)
Mg3Si2O5(OH)4
Ropes Gold Mine
Ishpeming, Michigan
Serpentine
Mg3Si2O5(OH)4
Lake Valhalla, Montville, NJ
Sulphur
S
Baja California, Mexico
Selenite (a variety of gypsum)
CaSO4 2H20
Michigan Natural Storage Co mine
Grand Rapids, Michigan
Sedementary Rocks are formed by the actions of water, wind, and/or organic agents.
Talc
Mg2Si4O10(OH)2
Alaska
Tektite
Indonesia
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
Mt. Mica, Maine
Tourmaline
White CaMg3B3Al3(Al3Si6O27)(O,OH,F)4
Black NaFe3B3Al3(Al3Si6O27)(O,OH,F)4
Ulexite
NaCaB5O9 8H2O
Death Valley, California
Vesuvanite
Ca10Al4(Mg,Fe)2Si9O34(OH)4
Mexico
Wavelite
Al3(OH)3(PO4)2 5H2O
Arkansas
X - The classic unknown variable. Can you help me identify these stones?
Porcupine Mts, Michigan
Houghton, Michigan
Iron Bridge Ontario, Canada
Y - You can collect Rocks and Minerals too. Here are some of the things that will
help:
Knapsack
Rock Hammer, chisel, and Safety Glasses
Streak Plate (unglazed ceramic tile)
hardness testing kit
magnifier
Guidebooks
the Internet - search on Rockhound
egg cartons (great for storing rocks-labels in lid)
notepad and pencil
newspaper
black light
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
4296 Oakview, Hudsonville, MI 49426
Meetings: 3rd Tue., 7:30 pm (except June-Aug. picnics)
Sunset Park Church
3450 Michael Ave.
Zeolites: Heulandite
(Ca,Na,K)6Al10(Al,Si)Si29O80 25H2O
India
Please forgive any formatting errors - my word processor used to create the label file this page was generated from did not do a very good job of converting to HTML.