Vivianite

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Physical & Optical Properties

Category Collector Gems
Mohs Hardness 1.5 – 2.0
Specific Gravity 2.64 – 2.7
Refractive Index 1.56 – 1.64
Crystal System Monoclinic
Luster Vitreous,Pearly,Dull (Earthy)
Cleavage Perfect
Color various
Birefringence 0.054
Pleochroism Anomalous plechroism is strong with colours deep blue/pale yellowish green/yellowish green.

Mohs Hardness

Mohs Hardness: 1.5 – 2.0
1 Soft10 Hard

Crystal System

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

Value & Market

Price Tier Budget (< $50/ct)

Where to Buy Vivianite

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About Vivianite

Vivianite is a hydrated iron phosphate mineral that displays a remarkable color evolution—forming colorless when first exposed but rapidly developing deep blue to blue-green, indigo, and near-black hues upon oxidation. Spectacular specimen-grade clusters with deep azure crystals come from Llallagua, Bolivia and Cameroon, while more recent fame has come from beautifully preserved blue Vivianite fossil bones and teeth. Its depth of color rivals fine blue sapphire, making large transparent specimens among the most visually striking in mineralogy.

Jewelry Use

Durability 1/10

Science FYI Family

Frequently Asked Questions

What is Vivianite?
Vivianite is a hydrated iron phosphate mineral that displays a remarkable color evolution—forming colorless when first exposed but rapidly developing deep blue to blue-green, indigo, and near-black hues upon oxidation. Spectacular specimen-grade clusters with deep azure crystals come from Llallagua,
What is the hardness of Vivianite?
Vivianite has a Mohs hardness of 1.5 to 2.0, making it relatively soft for use in jewelry.
What color is Vivianite?
Vivianite is primarily Various.
How much does Vivianite cost?
Vivianite falls into the Budget (< $50/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Vivianite?
Vivianite belongs to the Monoclinic crystal system.