Select Gemstone or Rock by Name
or use the A-Z quick reference above
| GEMSTONE OR ROCK NAME |
COUNTY |
LOCATION |
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 |
| 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 |
TWIN FALLS |
• 4 miles south of US 93 White Cloud Road area |
| 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. |
| 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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