GEMSTONE OR ROCK NAME
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COUNTY
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LOCATION
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AGATES - NODULES
Cryptocrystalline Quartz
| CUSTER |
• Lime Creek 12 miles south of Challis along US 93A
• Iris along Willow Creek Road off US 93A south of Challis
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| OWYHEE | • Squaw Creek |
AGATES - PLUME
Cryptocrystalline Quartz
| OWYHEE | • Graveyard Point southwest of Homedale (private mine) west of US 95 near Idaho-Oregon border |
AGATES - GREEN & GREEN MOSS
Cryptocrystalline Quartz
| BLAINE | • 9 miles north of Muldoon, south of Cary, along Little Wood River |
| LEMHI | • Parker Mountain near Salmon |
AGATES - BANDED & SCENIC
Cryptocrystalline Quartz
| LEMHI | • South of Meyers Cove |
AGATES - LIGHT BLUE
Cryptocrystalline Quartz
| GEM | • Near Emmett |
AGATES - RED
Cryptocrystalline Quartz
| CUSTER | • 3 miles west of Challis |
AGATES - RED & GREEN
Cryptocrystalline Quartz
| OWYHEE | • Eastern fringe of Succor Creek |
| AGATIZED WOOD | CUSTER | • 12 miles south of Challis along US 93A |
| WASHINGTON | • Hog Creek 8-10 miles northwest of Weiser |
| AMETHYST | BLAINE | • Pole Creek |
| CUSTER | • Lost River |
| OWYHEE | • War Eagle Mountain near Silver City
• "Indian Bathtub" area |
| VALLEY | • Paddy Flat and Big Creek area near Cascade |
ANALCITE
isometric zeolite mineral; last zeolite to be deposited.
| BLAINE | • Golden Bell Mine in head of gulch containing Minnie Moore Mine near Bellevue |
| CUSTER | • South of Challis |
APATITE
Calcium phosphate
| CUSTER | • Blackbird Mining District |
| AQUAMARINE | ELMORE | • Above Atlanta |
AZURITE
Copper carbonate
| ADAMS | • Seven Devils Mining District |
| CUSTER | • Alder Creek and Bayhorse Mining Districts |
| LATAH | • Hoodoo Mining District |
| SHOSHONE | • Little North Fork area near Kellogg and Mullan |
| OWYHEE | • South Mountain area |
| BERYL - GREEN | LATAH | • In pegmatites of the Levi Anderson, Muscovite and other mica mines near Avon |
| BERYL - DARK BLUE | ELMORE | • In primitive area near Atlanta |
CALCITE - FLUORESCENT
Calcium carbonate
| CUSTER | • Alder Creek, Bayhorse and Yankee Fork Mining Districts |
CALCITE - RHOMBOHEDRONS
Calcium Carbonate
| ADAMS | • White Mountain Mine, Seven Devils Mining District |
| BLAINE | • Hailey (Mineral Hill) Mining District |
CALCITE - MASSIVE / GRANULAR
Calcium Carbonate
| SHOSHONE | • Sunshine, Bunker Hill, Hypotheek, Hecla, Standard-Mammoth and Hercules Mines, Coeur d'Alene Mining District |
CASSITERITE
Tin Oxide
| LEMHI | • Silver Creek
• Panther Creek near junction of Moyer Creek, Cobalt area |
| OWYHEE | • Along Jordan Creek near Silver City |
CEYLONITE
Spinel
| BLAINE | • Wild Horse Canyon east side of Hyndman Peak |
| ADAMS | • Rocky Flat area near New Meadows and Seven Devils Mining District |
CHABAZITE
Form of Zeolite
| ADAMS | • Blue Jacket Mine, Seven Devils Mining District |
| BOISE | • Warm Springs Creek area east of Boise |
| ELMORE | • 5 miles below Glenns Ferry |
| CHALCEDONY - FLUORESCENT | TWIN FALLS | • Rabbit Springs on Idaho-Nevada border US 93 |
| CHALCEDONY - VARIETIES | CUSTER | • Willow Creek Road south of Challis off US 93A
• Mahogany Creek in Pahsimeroi Valley and near North Fork of Lost River |
| OWYHEE | • War Eagle and Florida Mountain areas near Silver City |
| BLAINE | • Pole Creek Summit near Galena and south of Carey along Little Wood River |
| LATAH | • Potato Hill |
| LEMHI | • Parker Mountain Mining District |
| VALLEY | • Yellow Pine Mining District |
| CHRYSOCOLLA | BENEWAH | • Alder Creek |
| ADAMS | • Arkansas Mine, et al., Seven Devils Mining District |
| LATAH | • Hoodoo Mining District |
| SHOSHONE | • Coeur d'Alene Mining District |
| CINNABAR | CUSTER | • Alder Creek Mining District |
| VALLEY | • Yellow Pine Mining District |
| WASHINGTON | • Near Weiser |
| CRYSTALS - COBALT | LEMHI | • Blackbird Mining District |
| OWYHEE | • Silver City area |
| CRYSTALS - QUARTZ | CUSTER | • Near Bayhorse and in Yankee Fork Mining District |
| BENEWAH | • Crystal Peak northeast of Fernwood |
| IDAHO | • McKinley Gulch in Slate Creek and Ruby Meadows |
| OWYHEE | • Long Gulch south of Silver City |
| VALLEY | • Northwest of Donnelly |
| CORUNDUM | OWYHEE | • Near Silver City |
| CLEARWATER | • Along Rhodes and Orofino Creeks near Pierce |
| VALLEY | • Along Gold Fork Creek northeast of Donnelly |
| ADAMS | • Rock Flat gold placers near New Meadows |
| IDAHO | • Near (Resort) Burgdorf |
| DIAMONDS | ADAMS | • Little Goose Creek area near New Meadows |
DOGTOOTH SPAR
Calcite Crystals
| IDAHO | • Adjacent to US 95 midway between Riggins and Lucile |
| EPIDOTE | ADAMS | • Peacock, Queen, Copper Boy and other mines, Seven Devils Mining District |
| CLEARWATER | • Pierce area |
| CUSTER | • Near Park Creek |
| LEMHI | • Mackinaw and Carmen Creek Mining Districts |
| OWYHEE | • Near Silver City |
| VALLEY | • North of Paddy Flat Road northeast of Donnelly
• Deep Creek north of McCall |
| FELDSPAR - MOONSTONE | CAMAS | • Near Fairfield |
| FELDSPAR - PALE YELLOW | BOISE | • Shafer Creek |
| FELDSPAR - CLEAR | FREMONT | • Crystal Butte 18 miles north of St. Anthony |
| FELDSPAR - VARIETIES | LEMHI | • Blackbird Mining District |
| OWYHEE | • Silver City area |
| FLUORITE - PURPLE | CUSTER | • Empire Mine, Alder Creek Mining District |
| LEHMI | • South of Meyers Cove |
| VALLEY | • Stibnite |
| FOSSILS - SEE ZOISITE | | |
| GARNET - STAR | BENEWAH | • Purdue Creek, vicinity of Bovill and Clarkia and along East Fork of Emerald Creek (US Forest Service fee) |
| GARNET - LIME SILICATE | ADAMS | • Seven Devils Mining District |
| BEAR LAKE | • Lanes Creek (NW 1/4, Section 9, Township 8 S, Range 43 E, BM) |
| CUSTER | • Phi Kappa Canyon near head of Big Lost River
• Copper Basin at head of East Fork of Big Lost River
• Alder Creek Mining District near Mackay |
GARNET - ROSE-RED
BROWN-RED | CLEARWATER | • Rhodes Creek, Orofino area, near Clearwater River
• Pierce area |
| NEZ PERCE | • Clearwater River near Lewiston |
| GARNET - RED | SHOSHONE | • Canyon Creek
• Purdue Creek |
| GARNET - PURPLE-RED | OWYHEE | • Silver City area |
| GARNET - YELLOW-GREEN | WASHINGTON | • Iron Mountain northeast of Weiser |
| GARNET - RED-PINK | ADAMS | • White Monument, Peacock and Copper Key mines near Kinney Point |
| IDAHO | • On main Salmon River 10 miles above Riggins |
| HEDENBERGITE & ILVAITE | OWYHEE | • South Mountain Mining District |
| HEMATITE - PEBBLES | BANNOCK | • Lane's Creek gravel bars |
| BOISE | • Boise Basin placers |
| HEMATITE | ADAMS | • Rock Flat on Goose Creek |
| CUSTER | • In dumps of copper mines, Alder Creek Mining District |
| LATAH | • Iron Mountain 20 miles north of Moscow |
| WASHINGTON | • Iron Mountain |
| JADE | FREMONT | • Bitch Creek north of Tetonia |
| JASPER - RED WITH GREEN MALACHITE | BEAR LAKE | • Hummingbird Mine area in Paris Canyon near Montpelier |
| JASPER - BRUNEAU | OWYHEE | • 50 road miles south of Bruneau in Bruneau River Canyon |
| JASPER - VARIETIES | BLAINE | • South of Carey along Little Wood River |
| CUSTER | • Crane Creek Reservoir area, 12 miles south of Challis along US 93A
• Alder Creek Mining District near Mackay |
| OWYHEE | • West of US 95 south of Homedale near Idaho-Oregon border |
| WASHINGTON | • Signal Light 10 miles northwest of Weiser
• Beacon Hill near Weiser |
| KYANITE | SHOSHONE | • Goat Mountain and Blackdome Peak area |
| MALACHITE | ADAMS | • Seven Devils Mining District |
| BEAR LAKE | • Hummingbird Mine in Paris Canyon |
| CUSTER | • Alder Creek Mining District |
| FREMONT | • Skull Canyon area two miles east of Kaufman |
| LATAH | • Hoodoo District |
| SHOSHONE | • Coeur d'Alene and adjacent mining districts |
| MARCASITE | LEMHI | • 1 mile south of Salmon |
| OWYHEE | • Associated with silver mines near Silver City |
| SHOSHONE | • In the Gold Hunter Mine, Coeur d'Alene Mining District |
| MORDENITE | CUSTER | • 15 miles south of Challis |
| LEMHI | • Near Salmon |
| MYRMEKITE | VALLEY | • Yellow Pine Mining District |
| NAUMANNITE | CUSTER | • Yankee Fork District |
| LEMHI | • Parker Mountain Mines, Gravel Range Mining District |
| OWYHEE | • DeLamar Mine on Florida Mountain near Silver City |
| OPAL - FIRE | CLARK | • Spencer Opal Mine near Spencer (private - fee charged) |
| GEM | • Lava beds of Squaw Butte, Emmett area, and Black Canyon Dam |
| LATAH | • 5 miles south of Forney on Opal Creek |
| OWYHEE | • Near Givens Hot Springs, Oreana and on the west side of Squaw Creek |
| OPAL - BANDED | CUSTER | • 3 miles west of Challis |
| OWYHEE | • Squaw Creek |
| OPAL - HYALITE | NEZ PERCE | • Near Lewiston area |
OPAL - COLORED
| GEM | • Red to salmon-pink to whites and pale blues along Willow Creek near Emmett |
| OPAL - VARIETIES | LEMHI | • Pahsimeroi Valley near May |
| OPAL - COMMON | CUSTER | • Poison Creek |
| LATAH | • Moscow Opal Mines |
| LEMHI | • Panther Creek
• Pahsimeroi Valley near May |
| NEZ PERCE | • Clearwater River Valley |
| OWYHEE | • 17 miles south of Marsing
• Castle Creek
• Mule Springs
• Givens Hot Springs area |
| OPALIZED WOOD | GOODING | • Clover Creek area |
| LATAH | • Potlatch River Canyon, Kendrick area |
| OWYHEE | • Few miles southeast of Hwy 95 at Idaho-Oregon state line in Coal Mine Basin (black opalized wood found in sandstone formation) |
| PROUSTITE | BLAINE | • Pilgrim Mine near head of Beaver Creek |
| BOISE | • Banner Mining District |
| BUTTE | • Hub Mine, Lava Creek Mining District |
| OWYHEE | • War Eagle Mountain and Florida Mountain area near Silver City |
| SHOSHONE | • Big Creek area |
| PETRIFIED WOOD | CUSTER | • Willow Creek Road south of Challis off US 93A
• Malm Gulch area |
| LINCOLN | • Clover Creek |
| OWYHEE | • West of DeLamar off Jordan Valley Road
• Middle reaches East Fork of Bruneau River
• 9 miles south of Bruneau east of US 51
• Sands Basin |
| WASHINGTON | • Manns Creek area near Weiser
• Sage Creek near Weiser
• Crane Creek area |
| PETRIFIED WOOD - BLACK | OWYHEE | • Coal Mine Basin on US 85 south of Marsing
• Middle reaches East Fork Bruneau River 9 miles south of Coal Mine Basin on US 85 south of Marsing
• Clover Creek area |
| WASHINGTON | • Sage Creek northwest of Weiser |
| PYRITE | BLAINE | • Hailey Gold Belt |
| BOISE | • Quartzburg area |
| LEMHI | • Mackinaw Mining District |
| SHOSHONE | • Coeur d'Alene Mine District |
| QUARTZ - CRYSTALS | BLAINE | • Pole Creek tributary of Little Wood River |
| IDAHO | • Near Warren |
| OWYHEE | • At mines near Silver City |
| SHOSHONE | • On O'Donnell Creek near Stocking Meadows |
| VALLEY | • Green Mountain area |
| QUARTZ - CLUSTERS | SHOSHONE | • Gem, Burke, Murray and Delta areas |
| QUARTZ - SMOKEY | ELMORE | • Dismal swamp northwest of Rocky Bar |
| LEMHI | • Along Bandy Creek |
| VALLEY | • Paddy Flats, Big Creek near Cascade |
| QUARTZ - GEODES | CUSTER | • Upper Valley of Lost River |
| OWYHEE | • DeLamar Silver Mine area |
| WASHINGTON | • Northwest of Weiser |
| QUARTZ - PSEUDOMORPHIC | BUTTE | • Lava Creek Mining District |
| OWYHEE | • War Eagle and Florida Mountain areas near Silver City |
| RHODOCHROSITE | KOOTENAI | • Conjecture Mine south of Lakeview (REMARKS: PINK) |
| LEMHI | • Blackbird Mining District and Kitty Burton Mine in Indian Creek District |
| RHODONITE | ADAMS | • South of New Meadows |
| RUBIES | ADAMS | • Placer deposits near New Meadows in Adams and Valley counties |
| CLEARWATER | • Clearwater Drainage near Pierce |
| OWYHEE | • DeLamar - Silver City area |
| VALLEY | • Placer deposits near New Meadows in Adams and Valley counties |
| SAPPHIRES | ADAMS | • Rocky Flat area near New Meadows |
| CLEARWATER | • Rhodes Creek near Pierce
• Orofino Creek near Pierce |
| VALLEY | • East slope of Brundage Mountain |
SILLIMANITE
Fibrolite
| LEMHI | • Salmon River below Salmon |
| NEZ PERCE | • Clearwater River Valley above Lewiston
• Big Eddy of Clearwater River above Spaulding |
| STAUROLITE | BENEWAH | • 5 miles up Carpenter Creek from junction with St. Maries River |
| SHOSHONE | • St. Joe Basin and along St. Joe - Clearwater Divide |
| STILBITE | ADAMS | • Blue Jacket Claim, Seven Devils Mining District |
| BLAINE | • Minnie Moore Mine near Bellevue |
| CUSTER | • North side of Galena Summit |
THULITE
Pink-colored Zoisite
| ADAMS | • Seven Devils Mining District |
| THUNDER EGGS - AMETHYST LINED |
| WASHINGTON | • Beacon Hill, Hog Creek, Weiser area |
| THUNDER EGGS - QUARTZ LINED | BUTTE | • Antelope Creek, Arco area
• Road Creek, Arco area |
| TWIN FALLS | • Rabbit Springs, US 93 Idaho-Nevada border |
| TOPAZ | ELMORE | • Dismal Swamp 9 1/2 miles northwest of Rocky Bar |
| TOPAZ - BLUE | VALLEY | • Along tributary of Paddy Creek in Paddy Flat area on Gold Fork Creek
• Donnelly area |
| TOPAZ - YELLOW | CLARK | • Camas Creek |
| TOURMALINE | BLAINE | • South flank Hyndman Peak |
| BOISE | • Boise Basin area |
| CLEARWATER | • Pierce area |
| LATAH | • Avon area |
| LEMHI | • Blackbird Mining District |
VALENCIANITE
Adularia
| CUSTER | • Yankee Fork District |
| LEMHI | • Gravel Range and Parker Mountain District |
| OWYHEE | • War Eagle and Florida Mountain near Silver City |
| WILLOWHITE | ADA | • Longhair Mine north of Eagle |
ZEOLITES
| CUSTER |
• Various locations
An interesting group of hydrated aluminous silicates. Occurs as amygdular fillings in vesicles in basalt or amiosite flows; also as geode filling. Thought deposited by hot waters at time of cooling of magmas. Various locations in Owyhee and Custer counties.
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| OWYHEE | • Various locations |
| ZIRCON | IDAHO | • Streams draining Idaho batholith, principally the American River near Elk City |
| ZOISITE (FOSSILS) | ADAMS | • Seven Devils Mining District |
ZOISITE (FOSSILS)
CAMBRIAN | BONNER | • In limy rock along southeast side of Pend Oreille Lake |
| GOODING | • West rim of Snake River Canyon near Hagerman |
ZOISITE (FOSSILS)
MARINE | OWYHEE | • 9 miles south of Bruneau and to right of US 51 |
ZOISITE (FOSSILS)
TEMPSKYA | BONNEVILLE | • 13 miles northwest of Hermans on Willow Creek |
ZOISITE (FOSSILS)
TRILOBITE | VALLEY | • South Fork of Gold Creek |
ZOISITE (FOSSILS)
GRAPTOLITES AND INVERTEBRATES | BLAINE | • Trail Creek east of Sun Valley |
| CUSTER | • Shelves of Lost River Range
• Bayhorse area north of Clayton |
ZOISITE (FOSSILS)
MOLLUSKS | CUSTER | • Bayhorse area |
ZOISITE (FOSSILS)
FISH | CUSTER | • Lost River Range near Mackay |
ZOISITE (FOSSILS)
MASTODON & MAMMOTH | LATAH | • In sediments of Snake River Plain as far north as Palouse Hills |
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