Dallasite

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Physical & Optical Properties

Mohs Hardness 6.5 – 7.0
Specific Gravity 2.58 – 2.91
Refractive Index 1.54
Crystal System Trigonal
Color various
Birefringence 0.008

Mohs Hardness

Mohs Hardness: 6.5 – 7.0
1 Soft10 Hard

Crystal System

a a a Trigonal (Rhombohedral) a = b = c, α = β = γ ≠ 90°

Value & Market

Price Tier Moderate ($50-500/ct)

About Dallasite

Dallasite is a distinctive ornamental rock found almost exclusively on Vancouver Island, British Columbia, Canada, consisting of a dark green chlorite matrix riddled with white to cream calcite vein networks that create a striking web or mosaic pattern. Named after an old name for Victoria, BC, it is used as a lapidary material for cabochons and decorative objects that showcase its unique, graphic patterning. It is essentially a regional gemstone celebrated by Pacific Northwest lapidary artists.

Jewelry Use

Durability 6/10

Science FYI Family

Frequently Asked Questions

What is Dallasite?
Dallasite is a distinctive ornamental rock found almost exclusively on Vancouver Island, British Columbia, Canada, consisting of a dark green chlorite matrix riddled with white to cream calcite vein networks that create a striking web or mosaic pattern. Named after an old name for Victoria, BC, it i
What is the hardness of Dallasite?
Dallasite has a Mohs hardness of 6.5 to 7.0, making it moderate for use in jewelry.
What color is Dallasite?
Dallasite is primarily Various.
How much does Dallasite cost?
Dallasite falls into the Moderate ($50-500/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Dallasite?
Dallasite belongs to the Trigonal crystal system.

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