Serendibite

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Physical & Optical Properties

Mohs Hardness 6,5 – 7,0
Specific Gravity 3,43 – 3,44
Refractive Index 1,696 – 1,702
Crystal System Triclinic
Luster Vitreous
Cleavage None
Fracture Uneven
Color various
Birefringence 0,005
Pleochroism Strong: yellowish-green -- bluish-green --violet-blue

Mohs Hardness

Mohs Hardness: 6,5 – 7,0
1 Soft10 Hard

Crystal System

a b c Triclinic a ≠ b ≠ c, α ≠ β ≠ γ ≠ 90°

Value & Market

Price Tier Moderate ($50-500/ct)

About Serendibite

Serendibite is an extremely rare calcium magnesium borosilicate mineral, typically dark blue-gray to black in color with a vitreous luster, found in contact metamorphic skarns near Gangapitiya in Sri Lanka (ancient Serendib, from which it takes its name) and in the Adirondacks, New York. Transparent blue-gray facetable material is extraordinarily scarce and represents some of the rarest gemstones cut from this species. Its deep history in Sri Lanka links it to one of the first gem localities known to antiquity.

Jewelry Use

Durability 6/10

Science FYI Family

Frequently Asked Questions

What is Serendibite?
Serendibite is an extremely rare calcium magnesium borosilicate mineral, typically dark blue-gray to black in color with a vitreous luster, found in contact metamorphic skarns near Gangapitiya in Sri Lanka (ancient Serendib, from which it takes its name) and in the Adirondacks, New York. Transparent
What is the hardness of Serendibite?
Serendibite has a Mohs hardness of 6.5 to 7.0, making it moderate for use in jewelry.
What color is Serendibite?
Serendibite is primarily Various.
How much does Serendibite cost?
Serendibite falls into the Moderate ($50-500/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Serendibite?
Serendibite belongs to the Triclinic crystal system.

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