Login / Registration
Contacts
Moscow, Russia
Shipping: worldwide
We work 7 days a week
Orders are accepted
around the clock
Catalog
Product search
Diameter, mm (1mm - 0,039inch)
–
–
Сlear filter
  1. Index
  2. Collectible minerals
  3. Kyanite

Collectible minerals - full range in stock "Kyanite"

Kyanite is a mineral characteristic of metamorphic rocks with a high content of alumina. Also, but much less frequently, it can be present both in igneous rocks and in hydrothermal formations. It has anisotropy of hardness: its hardness is 4.5 along the crystal, and 6.5 across it. As a rule, kyanite crystals are opaque, but sometimes they can have a "cat's eye" effect.

You can see kyanite stone for sale and buy it in the Minerals of Russia online store.

Physical properties of Kyanite

General
Category Nesosilicate
Formula
(repeating unit)		 Al2SiO5
IMA symbol Ky
Strunz classification 9.AF.15
Crystal system Triclinic
Crystal class Pinacoidal (1)
(same H-M symbol)
Space group P1
Unit cell a = 7.1262(12) Å
b = 7.852(10) Å
c = 5.5724(10) Å
α = 89.99(2)°, β = 101.11(2)°
γ = 106.03(1)°; Z = 4
Identification
Color Blue, white, rarely green, light gray to gray, rarely yellow, pink, orange, and black, can be zoned
Crystal habit Columnar; fibrous; bladed
Twinning Lamellar on {100}
Cleavage [100] perfect [010] imperfect with 79° angle between
Fracture Splintery
Tenacity Brittle
Mohs scale hardness 4.5-5 parallel to one axis
6.5-7 perpendicular to that axis
Luster Vitreous to white
Streak White
Diaphaneity Transparent to translucent
Specific gravity 3.53 - 3.65 measured; 3.67 calculated
Optical properties Biaxial (-)
Refractive index nα = 1.712 - 1.718 nβ = 1.720 - 1.725 nγ = 1.727 - 1.734
Pleochroism Trichroic, colorless to pale blue to blue
2V angle 78°-83°

Kyanite
Code: 4792
Kyanite
Borisovskie Sopki, South Ural, RF
51*33*15mm

0.00 $ $36.67

Kyanite
Code: 4316
Kyanite
Borisovskie Sopki, South Ural, RF
75*53*25mm

0.00 $ $56.67

Kyanite
Code: 1327
Kyanite
Borisovskie Sopki, South Ural, RF
68*64*29mm

0.00 $ $40.00

Kyanite
Code: 1190
Kyanite
Borisovskie Sopki, South Ural, RF
60*45*27mm

0.00 $ $30.00

Kyanite
Code: 1191
Kyanite
Borisovskie Sopki, South Ural, RF
53*45*22mm

0.00 $ $20.00

Kyanite
Code: 1080
Kyanite
Borisovskie Sopki, South Ural, RF
86*42*26mm

0.00 $ $48.33

Kyanite archived
Code: 4317
Kyanite
Borisovskie Sopki, South Ural, RF
38*26*10mm

0.00 $ $20.00

Kyanite archived
Code: 1192
Kyanite
Borisovskie Sopki, South Ural, RF
41*23*10mm

0.00 $ $15.00

Kyanite archived
Code: 1081
Kyanite
Borisovskie Sopki, South Ural, RF
79*37*31mm

0.00 $ $40.00

I want to receive information about new products
Moscow, Russia
Shipping: worldwide
We work 7 days a week
Orders are accepted
around the clock
Privacy policy