Microcline

Microcline is a form of alkali feldspar. It may be white, colorless, yellow, green, grey, red, pink, or blue-green. The stone may be cut en cabochon, up to almost any size.

Although microcline has the same composition as orthoclase, its crystal structure is triclinic. A microcline crystal may have a silky luster on some surfaces.

Occurrence

The most important source of amazonite is India. Other localities include Canada, the USA, Namibia, Tanzania, Madagascar, and the former USSR.

Microcline Properties

• Specific Gravity: 2.56
• Refractive Index: 1.52-1.53
• Birefringence (DR): 0.008
• Luster: Vitreous to silky
• Crystal Structure: Triclinic
• Composition: Potassium aluminum silicate
• Hardness: 6

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Crystals Directory

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

A

B

C

D

E

F

G

H

I

J

K

L

M

N

O

P

Q

R

S

T

U

W

Y

Z

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Birthstone

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