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Diameter, mm (1mm - 0,039inch)

Collectible minerals - full range in stock "Danburite"

Danburite is a rare collectible mineral. Used to obtain boron. High quality danburite crystals are used by jewelers.

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

Physical Properties of Danburite

General
Category Tectosilicates
Formula
(repeating unit)
CaB2(SiO4)2
IMA symbol Dbu[1]
Strunz classification 9.FA.65
Dana classification 56.3.1.1
Crystal system Orthorhombic
Crystal class Dipyramidal (mmm)
H-M symbol: (2/m 2/m 2/m)
Space group Pnam
Unit cell a = 8.038(3), b = 8.752(5)
c = 7.73 [Å]; Z = 4
Identification
Colour Colourless, white, gray, brownish white, straw yellow
Crystal habit Euhedral prismatic crystals; disseminated masses
Cleavage {001} Poor
Fracture Subconchoidal to uneven
Tenacity Brittle
Mohs scale hardness 7 – 7.5
Lustre Vitreous – greasy
Streak White
Diaphaneity Transparent to translucent
Specific gravity 2.93 - 3.02
Optical properties Biaxial (+/-)
Refractive index nα = 1.627 – 1.633 nβ = 1.630 – 1.636 nγ = 1.633 – 1.639
Birefringence δ = 0.006
2V angle 88 to 90° measured
Dispersion r < v strong
Ultraviolet fluorescence Fluorescent and thermoluminescent (red); Short UV=violet blue; Long UV=blue to blue-green
Code: 3712
Dalnegorsk, Primorye, RF
67*42*33mm

0.00 $ $65.00

Code: 3713
Dalnegorsk, Primorye, RF
58*41*28mm

0.00 $ $40.00

Code: 4572
Dalnegorsk, Primorye, RF
57*33*24mm

0.00 $ $25.00

Code: 3827
Dalnegorsk, Primorye, RF
40*29*22mm

0.00 $ $28.33

Code: 3714
Dalnegorsk, Primorye, RF
37*37*36mm

0.00 $ $28.33

Code: 3463
Dalnegorsk, Primorye, RF
62*33*21mm

0.00 $ $30.00

Code: 2260
Dalnegorsk, Primorye, RF
54*45*35mm

0.00 $ $19.67

Code: 2261
Dalnegorsk, Primorye, RF
75*38*15mm

0.00 $ $36.00

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