In 1893 borosilicate glass was invented by German chemist Otto Schott who founded Schott AG in the same year.
Dumortierite
A borosilicate mineral, typically blue or violet in colour. Similar in appearance to sodalite and lazurite, it is commonly used to imitate Lapis Lazuli ...
Tourmalines are borosilicates with a very complex structure. The colours are caused, among other things, by tiny amounts of foreign matter and trace elements.
CaB2Si2O8 calcium borosilicate
Color(s):
clear, white, brown, greenish, occasionally pale yellow ...
Danburite (Calcium borosilicate - CaB2Si2O8) is a clear to white silicate mineral whose orthorhombic crystals are transparent to translucent (danburite can also be yellow, greenish, or brown); it resembles topaz.
calcium borosilicate
Crystallography: orthorhombic
Colors: pale yellow, colorless
Luster: vitreous
Hardness: 7
Specific gravity: 3
Cleavage: poor
Refractive index: avg. 1.633 v. .006
Occurrence: Burma
Crystal or stone size: ...
The attractively bright color and good hardness of this borosilicate mineral make it truly refreshing. Named after a French paleontologist, Eugene Dumortier, dumortierite is typically blue or violet in color.
Because of its flexible borosilicate crystal structure, it can accommodate a variety of both color center imperfections as well as color causing transition metals, and minor differences in make up can greatly affect the color.
Dravite is a name for a complex sodium aluminum borosilicate that is a theoretical end-member of tourmaline which has no intrinsic color.
Several types of formulated glass which are heavier, more resistant to heat, are used to make glass beads - Dichroic glass, Furnace Glass, Borosilicate glass (glass used to manufacture microwave safe containers) lead glass (used to manufacture ...
Tourmaline is a complex borosilicate mineral with varying amounts of aluminum, iron, magnesium, sodium, lithium, potassium, and sometimes other elements, used as a gem.
Chemical composition -- The tourmaline family is a group of closely related minerals with complex chemical formulas containing aluminum borosilicates and varying quantities of sodium, magnesium, calcium, iron, chromium, manganese, potassium, etc.
A metamorphic mineral, kornerupine is a complex magnesium aluminum borosilicate whose crystals are often found in alluvial deposits collected behind rocks or in the bends of rivers.
For these applications, borosilicate glass (such as Pyrex) is usually used for its strength and low coefficient of thermal expansion, ...
Tourmaline is a complex borosilicate of aluminum, containing variable amounts of alkali metals, calcium, iron, and manganese.
The chemical name of Axinite is Calcium Manganese Iron Magnesium Aluminium Borosilicate Hydroxide. It is basically triclinic in structure, characterized by the absence of symmetry surfaces. The crystals can be either transparent or translucent.
It is a fairly hard mineral, 7 - 7.5
on the Mohs hardness scale.
Tourmaline is a borosilicate mineral.
It is found in many locations -
Brazil, Russia , Afghanistan and California
are important sources.
Strass (or "Strasse"): A brilliant glass with high light refraction and exceptional iridescence, (essentially consisting of a complex borosilicate of lead and potassium), used to manufacture artificial gemstones.
Overview: The name is derived from the Greek 'Dateisthai', which means "To Divide" referring to the fact that the mineral crumbles quite easily. Datolite is a borosilicate mineral.
Tourmaline: A more recent gemstone, it is found in virtually every color, even within the same stone, though green is the most common. Composition: complex borosilicate; hardness: 7-7.5.
 See also: Color, Gemstone, Crystal, Stone, Silicate
  
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