Herkimer Diamond Quartz Crystal Value Guide

Herkimer Diamonds are extraordinary double-terminated quartz crystals prized for their natural diamond-like clarity and 500-million-year-old Precambrian history. Found primarily in the dolomite of Herkimer County, New York, these specimens are unique because they emerge from the earth with eighteen natural facets, requiring no cutting or polishing.

What affects the value of Herkimer Diamond Quartz Crystal?

• Clarity and transparency, with 'water-clear' specimens commanding the highest prices within the $15-$30 range.
• The presence of rare inclusions or 'enhydro' bubbles (trapped ancient water) which can increase collector interest.
• Size and structural integrity, specifically the lack of chips or damage to the natural termination points.
• The complexity of the cluster, as multiple crystals joined together are often more valuable than single points.

How to Identify Herkimer Diamond Quartz Crystal?

• Look for the characteristic double-terminated points, meaning the crystal is naturally pointed at both ends.
• Verify the exceptional clarity and high luster that mimics the appearance of a genuine diamond.
• Check for the presence of eighteen natural facets, which is the standard geometry for these specific quartz formations.
• Examine the specimen for small black hydrocarbon inclusions, which are common in authentic Herkimer County samples.

History of Herkimer Diamond Quartz Crystal

Herkimer Diamonds are not true diamonds, but rather naturally faceted quartz crystals first discovered in the dolomite rocks exposed in and around Herkimer County, New York. These crystals are renowned for their exceptional clarity and characteristic double-terminated points, forming without the need for cutting or polishing. They are estimated to be about 500 million years old, having formed in cavities within sedimentary rock, making them a fascinating geological marvel.