Detailed sheet

microlite

Its name comes from the Greek “micro” to indicate that when discovered in 1835 it was only present in small crystals.



CHEMICAL CHARACTERISTICS

(Na,Ca)2Ta2O6(O,OH,F)

sodium calcium tantalum oxide



PHYSICAL CHARACTERISTICS

Main color

yellow

Other colors

brown, green

Color of streak

yellow

Luster

resinous, vitreous

Hardness

5.0 to 5.5

Density

4.30 to 5.70

Cleavage

indistinct

Fracture

conchoidal, splintery



OPTICAL PROPERTIES

Transparency

opaque, translucent

Refractive index

1.980 - 2.020

Double refraction

0.000

none, isotropic, sometimes crystals show some polarization anomalies

visible double refraction

No

Pleochroism

absent

Number of colors

1

Fluorescence

none



CRYSTALS PROPERTIES

very small octahedrons

crystals system

cubic



OTHER INFORMATIONS

Exploited
sites

It is found on the island of Elba in Italy, in Devon in England, in Austria, Moravia (Czech Republic), Rwanda, Madagascar, Brazil (Minas Gerais), the United States and Canada.

use in jewelry

it is cut in facets, it’s a collection stone

Other
Gems

Venez visitez

notre site web

voillot-joaillier.fr

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