Quartz Variety: Herkimer Diamond

Top specimens from Herkimer County, New York updated regularly with new finds from the most recent mining season!

Worldwide Minerals

Explore mineral specimens from around the world in our locality galleries!
Copper mineral specimen on a dark background

Specimens Under $100

Unique & exciting pieces for your collection, all under $100!
Featured Specimens
Serandite
Serandite
Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
Stibnite
Stibnite
Hunan, China
Fluorite
Fluorite
Zhejiang, China
Vanadinite
Vanadinite
Mibladen, Aït Oufella Caïdat, Midelt Cercle, Midelt Province, Drâa-Tafilalet Region, Morocco
Quartz Var. Amethyst
Quartz Var. Amethyst
Las Vigas de Ramírez Municipality, Veracruz, Mexico
Chrysocolla & Quartz
Chrysocolla & Quartz
Tentadora Mine, Julcani mining district, Ccochaccasa District, Angaraes Province, Huancavelica, Peru,
Native Copper
Native Copper
Keweenaw County, Michigan, USA
Quartz Var. Herkimer Diamond
Quartz Var. Herkimer Diamond
Herkimer Diamond Mine (Herkimer Diamond Development), Middleville, Town of Newport, Herkimer County, New York, USA
Quartz Var. Herkimer Diamond
Quartz Var. Herkimer Diamond
Herkimer Diamond Mine (Herkimer Diamond Development), Middleville, Town of Newport, Herkimer County, New York, USA
Serandite
Serandite
Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
Chrysocolla & Quartz
Chrysocolla & Quartz
Tentadora Mine, Julcani mining district, Ccochaccasa District, Angaraes Province, Huancavelica, Peru
Marcasite
Marcasite
Linwood Mine, Buffalo, Scott County, Iowa, USA
Spessartine Garnet & Smoky Quartz
Spessartine Garnet & Smoky Quartz
Wushan Spessartine Mine, Tongbei, Yunxiao Co., Zhangzhou, Fujian, China
Cerussite & Malachite
Cerussite & Malachite
Tsumeb Mine (Ongopolo Mine), Tsumeb, Oshikoto Region, Namibia
Calcite and Marcasite
Calcite and Marcasite
Rensselaer Quarry, Pleasant Ridge, Jasper County, Indiana, USA
Actinolite
Actinolite
Hastings County, Ontario, Canada

About Us

At Adamantine Minerals, we offer natural mineral specimens for collectors at all stages—from curious beginners to experienced enthusiasts. With a background in geology and a passion for the science behind each piece, we aim to make collecting both approachable and rewarding.

Learn More