What Is a Herkimer Diamond? Is It a Natural Diamond?

In the world of gemstones, Herkimer Diamond always makes many people curious because of its name. So, is Herkimer Diamond actually a diamond?

In fact, Herkimer Diamond possesses a naturally transparent, sparkling beauty along with a special double-pointed shape, and is considered the “diamond of the quartz world.” This article will help you clearly understand what Herkimer Diamond is, its value, feng shui meaning, as well as how to distinguish it from natural diamonds. 

What is Herkimer Diamond?

In the world of gemstones, Herkimer Diamond often makes many people mistakenly think it is a natural diamond. In reality, Herkimer Diamond is a special form of transparent quartz, found mainly in Herkimer County, New York, USA.

What makes Herkimer Diamond different is its double-terminated shape - meaning it has two natural points, requiring little to no cutting while still radiating a sparkling brilliance. This transparency, high luster, and shape like a “rough diamond” have helped herkimer diamond become globally famous and loved by gemstone collectors.

To explain more clearly, in the 14th century when this stone was discovered, it was not popular. Its colors were not diverse and it was difficult to craft. All diamonds were cut by hand. Therefore, most cuts were very simple such as 8-facet cuts, 9-facet cuts, or 18-facet cuts. 

Meanwhile, an uncut Herkimer crystal already has 18 facets. Therefore, when this stone was discovered, many people mistook it for a diamond.

Herkimer Diamond is a form of transparent quartz 

What is the formation process of Herkimer Diamond?

Herkimer crystals were formed about 500 million years ago in a shallow sea. This place received sediment from the ancient Adirondack Mountains in the North. Calcium and magnesium carbonate sediments accumulated and fossilized into dolostone bedrock, also known as Little Falls formations. 

What is the formation process of Herkimer diamond?

While the sediments were buried, cavities were formed by acidic water. This created holes and formed quartz crystals. 

In addition, when these sediments were buried at high temperatures, the crystals developed very slowly inside the cavities. This unintentionally led to quartz crystals with exceptional clarity resembling diamonds. 

Identifying characteristics of Herkimer Diamond

To distinguish herkimer diamond from diamonds or other gemstones, you can rely on the following characteristics:

• Crystal structure: usually has a double-pointed shape, different from most ordinary quartz.
• Color: mainly transparent like crystal, sometimes with black inclusions (carbon inclusions) or air bubbles.
• Hardness: about 7/10 on the Mohs scale, lower than natural diamond (10/10). Therefore, herkimer diamond is easily scratched if subjected to strong impact.
• Brilliance: thanks to its transparent surface, herkimer diamond reflects light beautifully, making many people think of real diamonds.

Thanks to this characteristic, Herkimer Diamond has become one of the most unique forms of quartz and has high collectible value.

The difference between Herkimer and ordinary quartz

Herkimer diamonds are naturally polished with 18 facets. Most of them have the characteristic double-pointed shape. In terms of structure, ordinary quartz is usually formed in clusters or as single crystals. However, Herkimer diamond quartz is unique. 

The biggest difference of Herkimer diamond is its hardness. Normally, ordinary quartz has a hardness of about 7.0 Mohs. But Herkimer alone has a hardness of up to 7.5 Mohs. This is because they are formed in places with higher temperatures and pressure. However, this number is still lower than diamond.

In addition, Herkimer crystals always sit on the host rock. They only attach to the original rock instead of growing on the original rock like ordinary quartz. Thanks to this, they are always extracted together with the original rock intact. 

What is inside Herkimer diamond?

Herkimer can also carry rainbow effects and air bubbles. In addition, they may also contain black carbon ore, Petroleum or possibly anthraxolite (plant material that decomposed 500 million years ago).

What are the imperfections of Herkimer diamond?

Feng shui & spiritual meaning of Herkimer Diamond

In the world of feng shui stones and energy, herkimer diamond is known as the “stone of attunement” - the connecting stone. People believe that Herkimer Diamond brings:

• The ability to enlighten intuition: helps improve concentration and the ability to see things clearly in work and life.
• Energy cleansing: helps remove negative energy, bringing balance and peace to the mind.
• Meditation support: many people use herkimer diamond during meditation to more easily reach a calm state.
• Symbol of good luck: bright in all four seasons, this stone is considered a symbol of luck, love, and prosperity.

Herkimer Diamond carries many feng shui values 

Thanks to these spiritual values, Herkimer Diamond is not only a beautiful stone but also a gift with deep spiritual meaning.

Compare Herkimer Diamond and Natural Diamond

Below is a visual comparison table between Herkimer Diamond and Natural Diamond for easier reference:

It can be seen that Herkimer Diamond cannot replace natural diamond, but it brings its own spiritual value, feng shui significance, and uniqueness in collecting and fashion.

Herkimer Diamond price 2025