18.60 ct – Rare Natural Herkimer Diamond Quartz – Fluorescent Crystal – New York, USA – With COA Specimen - Height: 26 mm - Width: 21 mm- 3.72 g - (1)

Herkimer diamonds are a unique form of double-terminated quartz crystals found primarily in Herkimer County, New York. Despite their name, they are not true diamonds but are prized for their exceptional clarity, natural faceting, and sometimes fluorescence under UV light. These crystals often form in dolomite rock and are noted for their sharp edges and sparkling appearance. A specimen weighing several grams with certificate of authenticity underlines its quality and provenance. Collectors value Herkimer diamonds for their natural beauty, rarity, and metaphysical allure. Their fluorescent property makes them stand out in mineral collections and display cases.