Despite their name, "Herkimer diamonds" are actually doubly-terminated colorless quartz crystals found in Herkimer, NY. The specimens shown here contain inclusions of trapped, orangey, mineralized water. 2.9 x 2.1 x 1.6 cm, Ace of Diamonds Mine, Middleville, Town of Newport, Herkimer Co., New York, USA. © Rob Lavinsky, www.iRocks.com. Used with permission.

Despite their name, &#8220;Herkimer diamonds&#8221; are actually doubly-terminated colorless quartz crystals found in Herkimer, NY. The specimens shown here contain inclusions of trapped, orangey, mineralized water. 2.9 x 2.1 x 1.6 cm, Ace of Diamonds Mine, Middleville, Town of Newport, Herkimer Co., New York, USA. © Rob Lavinsky, www.iRocks.com. Used with permission.

Quartz | Colorless - International Gem Society

Quartz id-m-375686 - International Gem Society

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Quartz

Despite their name, "Herkimer diamonds" are actually doubly-terminated <a href="https://www.gemsociety.org/article/crystalline-quartz-buying-guide/#Rock_Crystal" data-wpel-link="internal">colorless quartz crystals</a> found in Herkimer, NY. The <a href="https://www.irocks.com/minerals/specimen/29775" data-wpel-link="external" rel="nofollow external">specimens</a> shown here contain inclusions of trapped, orangey, mineralized water. 2.9 x 2.1 x 1.6 cm, Ace of Diamonds Mine, Middleville, Town of Newport, Herkimer Co., New York, USA. © Rob Lavinsky, <a href="http://www.irocks.com/" data-wpel-link="external" rel="nofollow external">www.iRocks.com</a>. Used with permission.

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The late Jeff Graham was a prolific faceter, creator of many original faceting designs, and the author of several highly-regarded instructional faceting books such as <a href="https://rockpeddler.com/product-category/instructional-materials/">Gram Faceting Designs</a>.

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Bear Williams

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Gemstone	Quartz
Natural or man made	Natural
Origin	United States
Origin details	Middleville, Town of Newport, Herkimer Co., New York
Height	29
Width	21
Depth	16
Gem State	Specimen
Color	Colorless
Transparency	Transparent
Inclusions	One-Phase