Microcline

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Physical & Optical Properties

Mohs Hardness 6,0 – 6,5
Specific Gravity 2,55 – 2,63
Refractive Index 1,514 – 1,539
Crystal System amazonite
Luster Vitreous
Cleavage Perfect
Fracture Uneven,Conchoidal
Color various
Birefringence 0,008
Pleochroism Weak

Mohs Hardness

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

Crystal System

Value & Market

Price Tier Moderate ($50-500/ct)

About Microcline

Microcline is a potassium aluminum silicate feldspar and the low-temperature polymorph of orthoclase, occurring in a wide range of colors including white, cream, pink, red, and the striking blue-green amazonite variety colored by trace lead and water. It is one of the most abundant minerals in continental crust, forming in granites, pegmatites, and metamorphic rocks worldwide. The amazonite variety, with its distinctive turquoise to vivid green color, is fashioned into cabochons, beads, and carvings popular in jewelry and decorative art.

Jewelry Use

Durability 5/10

Science FYI Family

Frequently Asked Questions

What is Microcline?
Microcline is a potassium aluminum silicate feldspar and the low-temperature polymorph of orthoclase, occurring in a wide range of colors including white, cream, pink, red, and the striking blue-green amazonite variety colored by trace lead and water. It is one of the most abundant minerals in conti
What is the hardness of Microcline?
Microcline has a Mohs hardness of 6.0 to 6.5, making it moderate for use in jewelry.
What color is Microcline?
Microcline is primarily Various.
How much does Microcline cost?
Microcline falls into the Moderate ($50-500/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Microcline?
Microcline belongs to the amazonite crystal system.

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