“Alaskan diamonds” (specifically Alaska Black Diamonds) are not actually diamonds; they are a marketing name for hematite, a dark grey to black mineral made of iron oxide. While they possess a striking metallic luster, they are chemically and structurally distinct from carbon-based diamonds. [1, 2, 3, 4]

Key Characteristics

• Composition: Alaska Black Diamonds are composed of hematite, which is an iron-based mineral, unlike real diamonds which are pure carbon.
• Appearance: They have a shimmering, metallic, dark-grey or “graphite black” finish.
• Durability: Hematite is much softer than a real diamond. While it is durable enough for most jewelry, it does not share the legendary hardness (10 on the Mohs scale) of a true diamond.
• Market Value: These stones generally have more sentimental than monetary value. They were particularly popular as souvenir jewelry in the mid-20th century. [1, 2, 3, 4, 5, 6]

Shopping for Alaska Black Diamond Jewelry

You can find these pieces through various specialized and vintage retailers:

• New Jewelry: Contemporary designs featuring hematite are available from A.T. Storrs Ltd. and Julie’s Genuine Alaskan.
• Vintage and Custom: For unique or mid-century styles, retailers like Etsy, eBay, and Marigold Vintage & Estate often carry authenticated vintage rings and pendants.

Comparison: Alaska Black Diamond vs. Real Black DiamondFeature [1, 2, 3, 4, 5]Alaska Black Diamond (Hematite)Real Black Diamond (Carbonado)MaterialIron Oxide (Hematite)CarbonLusterMetallic/Sub-metallicAdamantine (Diamond-like)Hardness~5.5–6.5 (Mohs scale)10 (Mohs scale)OriginCommon mineral found worldwidePrimarily Brazil/Central Africa

Are you looking for a vintage piece of Alaska jewelry, or are you interested in genuine black diamonds for an engagement or fine jewelry setting?

“Alaskan Black Diamond” is a trade name for hematite, a dark gray, metallic iron oxide popular in Alaskan jewelry since before the gold rush. Often used in vintage and handcrafted pieces, this material is not a real diamond. Genuine diamond jewelry, including gold nugget and blue diamond pieces, is also sold in Alaska.[1, 2, 3, 4]

Key Aspects of Alaskan Diamonds

• What it Is: The “Alaska Black Diamond” is actually hematite, a polished, silvery-black mineral known for its metallic luster.
• Jewelry Type: It is frequently found in vintage sterling silver or gold rings, necklaces, and brooch sets, often featuring marquise-cut stones.
• Availability: These stones are staples in souvenir jewelry shops throughout Alaska.
• Real Diamonds: While “Black Alaskan Diamond” is a misnomer for the stone, actual diamond exploration exists in Alaska, and retailers sell genuine gold-and-diamond jewelry. [1, 2, 3, 4, 5, 6]

Herkimer diamonds are not actually diamonds; they are exceptionally clear, double-terminated quartz crystals. They earned their “diamond” moniker because their natural brilliance and 18-sided geometric shape (featuring points at both ends) closely resemble the appearance of a true diamond. [1, 2, 3, 4]

Key Characteristics

• Double Termination: Unlike most quartz that grows from a host rock with one point, these form “freely” in rock cavities (vugs), allowing them to develop points at both ends.
• Natural Faceting: They emerge from the ground already faceted with 18 distinct faces (6 on each point and 6 around the center), requiring no cutting or polishing for jewelry use.
• Geologic Age: These crystals formed approximately 500 million years ago within the Little Falls Dolostone.
• Hardness: They score a 7 to 7.5 on the Mohs scale, making them harder than typical quartz (7.0) but softer than true diamonds (10.0).
• Unique Inclusions: Some contain “enhydros” (trapped ancient water bubbles) or black hydrocarbon flecks called anthraxolite. [1, 2, 3, 4, 5, 6, 7]

Geography & Mining

While similar double-terminated quartz is found globally (e.g., in Afghanistan or China), the name “Herkimer Diamond” is strictly reserved for those mined in Herkimer County, New York. [1, 2, 3]

Public mining is a popular local activity where visitors can keep what they find. Notable sites include: [1, 2]

• Herkimer Diamond Mines: Features a “Miners’ Village,” jewelry making, and above-ground surface mining.
• Ace of Diamonds Mine & Campground: Located in Middleville, offering prospecting for a fee.
• Diamond Mountain Mining: Known for rare “black-stemmed scepter” formations and guided “Wilderness Digs” in a forested setting. [1, 2, 3, 4, 5]

Uses and Meaning

• Jewelry: Often used in their raw, “as-found” state due to their natural brilliance.
• Metaphysical: Frequently called the “Stone of Attunement,” they are used by practitioners for meditation, spiritual growth, and amplifying the energy of other crystals.
• Alternative Birthstone: Sometimes used as a more affordable alternative to the traditional April birthstone. [1, 2, 3, 4, 5, 6]

Would you like to know more about the specific tools needed for mining or the current rates for a day dig at one of the New York mines?

Herkimer diamonds are exceptionally clear, double-terminated quartz crystals found in Herkimer County, New York, and surrounding areas. Formed over 500 million years ago, these crystals are known for their diamond-like brilliance, natural 18-facet, double-pointed shape, and high energy in metaphysical practices. They are not actual diamonds, but prized quartz. [1, 2, 3, 4]

Key Facts About Herkimer Diamonds

• Appearance: Water-clear, colorless quartz crystals, often with incredible clarity, though some contain carbon deposits or inclusions.
• Structure: Naturally double-terminated (pointed at both ends), often with 18 facets, requiring no cutting or polishing for jewelry.
• Location: Found in dolostone outcrops in the Mohawk River Valley, New York, particularly in Middleville and Little Falls.
• Geology: They formed within small cavities or “vugs” in dolomite rock hundreds of millions of years ago.
• Hardness: They have a Mohs hardness of 7.5, making them harder and more durable than typical quartz. [1, 2, 3, 4, 5]

Uses and Popularity

• Jewelry: Due to their natural beauty and high luster, they are frequently used in jewelry, including raw, uncut pieces.
• Metaphysical: Known as “stones of attunement,” they are used for stimulating spiritual energy, meditation, and healing.
• Collecting: Coveted by collectors for their unique, naturally faceted shapes. [1, 2, 3, 4, 5]

Mining and Finding Them

• Mining: Enthusiasts can hunt for these crystals at several public mines in Herkimer County, such as the Herkimer Diamond Mines or Crystal Ridge.
• Methods: Techniques include breaking apart rock, searching rubble, or digging in the soil for loose crystals. [1, 2, 3]

Differences from Real Diamonds
While named for their appearance, Herkimer diamonds are silicon dioxide (quartz), not carbon (diamonds). They are much more common than actual diamonds but are still considered a unique, sought-after gemstone.[1, 2, 3]