Nuummite

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Physical & Optical Properties

Mohs Hardness 5.5 – 6.0
Specific Gravity 3.18 – 3.37
Refractive Index 1.635 – 1.663
Crystal System Orthorhombic
Cleavage Perfect
Color various
Birefringence 0.022

Mohs Hardness

Mohs Hardness: 5.5 – 6.0
1 Soft10 Hard

Crystal System

a b c Orthorhombic a ≠ b ≠ c, α = β = γ = 90°

Value & Market

Price Tier Budget (< $50/ct)

About Nuummite

Nuummite is one of the oldest known rock types on Earth (approximately 3 billion years old), an amphibolite from the Nuuk region of Greenland composed of anthophyllite and gedrite amphiboles, displaying a remarkable iridescent schiller in golden, orange, red, blue, and green caused by light interference from oriented crystal lamellae. It is found exclusively in a small remote area of southwest Greenland and has been fashioned into cabochons and carvings since the 1980s. Nuummite's extraordinary antiquity and vivid iridescence make it a uniquely prized collector gem.

Jewelry Use

Durability 4/10

Science FYI Family

Frequently Asked Questions

What is Nuummite?
Nuummite is one of the oldest known rock types on Earth (approximately 3 billion years old), an amphibolite from the Nuuk region of Greenland composed of anthophyllite and gedrite amphiboles, displaying a remarkable iridescent schiller in golden, orange, red, blue, and green caused by light interfer
What is the hardness of Nuummite?
Nuummite has a Mohs hardness of 5.5 to 6.0, making it moderate for use in jewelry.
What color is Nuummite?
Nuummite is primarily Various.
How much does Nuummite cost?
Nuummite falls into the Budget (< $50/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Nuummite?
Nuummite belongs to the Orthorhombic crystal system.

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