Silicates

Emerald

________ is green beryl is colored by around 2 % chromium and sometimes vanadium.

purple zircon

Pink, red, and ________ occurs after hundreds of millions of years, if the crystal has sufficient trace elements to produce color centers.

chemistry

In ________, a silicate is any member of a family of anions consisting of silicon and oxygen.

Blue

________ and violet color is caused by small amounts of vanadium.

Olivine gemstones

________ are called peridot and chrysolite.

Zircon

________ occurs in many colors, including reddish brown, yellow, green, blue, gray and colorless.

Chain silicate network

(a) silicate tetrahedron, (b) single-row silicate chain, (c) two tetrahedra join together corner-to-corner, (d) & (e) larger structures of silicate tetrahedra

Jade

sodium aluminum silicate, NaAl(SiO3)2 (metasilicate, SiO32−)

Example of Jade in art

The Jadeite Cabbage or Jadeite Cabbage with Insects, 19th century, jade, 18.7 cm (7.4 in), National Palace Museum, Taipei, Taiwan

Example of Agate in art

The Meat-shaped Stone, a piece of jasper agate carved into the shape of a Dongpo pork

Carnelian

silica, SiO2

Example of Carnelian in art

Carnelian scarab, ca

Olivine

(Mg2+,Fe2+)2SiO4, Mg2SiO4 and Fe2SiO4, magnesium and iron(II) orthosilicate

Garnet (deep red)

Fe3Al2Si3O12 (Fe3Al2(SiO4)3, iron(II)aluminum orthosilicate

Pyrope

Mg3Al2Si3O12

Almandine

Fe3Al2Si3O12

Spessartine

Mn3Al2Si3O12

Andradite

Ca3Fe2Si3O12

Grossular

Ca3Al2Si3O12

Uvarovite

Ca3Cr2Si3O12

Topaz

Al₂SiO₄(F,OH)₂, orthosilicate mineral of aluminum and fluorine

Zircon

ZrSiO₄, zirconium silicate (source of zirconium)

Beryl

Be3Al2Si6O18 (Be3Al2(SiO3)6, metasilicate SiO32−)

Three varieties of beryl

morganite, aquamarine and emerald

Tanzanite

Ca₂Al₃(SiO₄)₃(OH)