Formula: Al₂SiO₄(F,OH)₂
Mineral class: silicates
Crystal system: orthorhombic
Mohs scale: 8
Density (g/cm³): 3.5 - 3.6
Cleavage: perfect
Colors: colorless, blue, yellow, brownish, red
Luster: vitreous
Fluorescence: rose Topaz: slightly brownish, red Topaz: slightly yellow-brown, yellow Topaz: slightly orange
Pleochroism: yellow Topaz: yellowish tones, blue Topaz: slightly colorless - light blue - rose, red Topaz: strong yellow - red
Largest Topaz: 1 m / 2.5 t (Ribaue-Alto Ligonha / Mozambique)
Largest faceted Topaz: 3.270 ct
Deposits: worldwide
Discovery: ?
1st Description: 1892

Topaz Mineral

Origin: Kleine Spitzkopje / Rossing / Namibia

Photo by kind permission of © www.irocks.com, Dr. Robert Lavinsky.

Topaz

Weight: 5.19 ct

Origin: Sri Lanka

Photo by kind permission of © www.irocks.com, Dr. Robert Lavinsky.

Topaz Mineral

Size: 1.3 x 1.1 x 0.9 cm

Origin: Miass / Ilmen Mts. / Chelyabinsk Oblast / Ural Mts. / Russia

Photo by kind permission of © www.fabreminerals.com, Jordi Fabre.

Topaz 2 colors

Weight: 14.86 ct

Origin: Russia

Photo by kind permission of © www.gemfrance.com, Dr. Laurent Sikirdji.

Topaz Mineral

Size of the crystal: 2.0 x 1.6 cm

Origin: Dassu / Shigar Valley / Skardu / Baltistan / Pakistan

Photo by kind permission of © www.fabreminerals.com, Jordi Fabre.

Topaz

Weight: 82.62 ct

Origin: Mogok / Myanmar

Photo by kind permission of © www.americanthai.com, Scott Davies.

Topaz

Origin: Texas / USA

Photo by kind permission of © www.theimage.com.

Topaz Mineral

Origin: Sakangyi / Mogok / Myanmar

Photo by kind permission of © www.exceptionalminerals.com, Kevin Ward.

Topaz

Weight: 7.26 ct

Origin: Pakistan

Photo by kind permission of © www.edelsteine.at, Thomas Pfneisl.

Topaz Mineral

Size: 1.8 x 0.8 x 0.6 cm

Origin: Ouro Preto / Minas Gerais / Brazil

Photo by kind permission of © www.fabreminerals.com, Jordi Fabre.

Topaz Mineral

Origin: Maynard Claims / Thomas Range / Utah / USA

Photo by kind permission of © www.irocks.com, Dr. Robert Lavinsky.

Topaz

Weight: 8.15 ct

Origin: Pakistan

Photo by kind permission of © www.edelsteine.at, Thomas Pfneisl.

Imperial Topaz Mineral

Origin: Ouro Preto / Minas Gerais / Brazil

Photo by kind permission of © www.exceptionalminerals.com, Kevin Ward.

Imperial Topaz

Photo by kind permission of © skywalker.cochise.edu, Roger Weller.

Topaz Mineral

Origin: Durango / Mexico

Photo by kind permission of © www.theimage.com.

Topaz heated

Weight: 23,40 ct

Origin: Brazil

Photo by kind permission of © www.riddgems.se, Simon Ridderborg.

Topaz Mineral

Origin: Rodrigo Silva Mine / Ouro Preto / Minas Gerais / Brazil

Photo by kind permission of © www.kqminerals.com, Keith Hayes.

Topaz Mineral

Origin: Thomas Range / Juab County / Utah / USA

Photo by kind permission of © www.theimage.com.

Imperial Topaz

Weight: 2.23 ct

Origin: Ouro Preto / Brazil

Photo by kind permission of © www.irocks.com, Dr. Robert Lavinsky.

Topaz Mineral

Origin: Limoeiro Mine / Minas Gerais / Brazil

Photo by kind permission of © www.exceptionalminerals.com, Kevin Ward.

Topaz Mineral

Photo by kind permission of © skywalker.cochise.edu, Roger Weller.

Topaz

Weight: 2.30 ct

Origin: Brazil

Photo by kind permission of © www.gemfrance.com, Dr. Laurent Sikirdji.

Topaz Mineral

Origin: Maple Lode Mine / San Diego County / California / USA

Photo by kind permission of © www.irocks.com, Dr. Robert Lavinsky.

Topaz

Weight: 12.76 ct

Origin: ?

Photo by kind permission of © www.multicolour.com, David Weinberg.

Topaz Mineral

Size: 4.9 x 3.9 x 3.4 cm

Origin: Little Three Mine / Ramona area / San Diego County / California / USA

Photo by kind permission of © www.irocks.com, Dr. Robert Lavinsky.

Topaz

Weight: 8.01 ct

Origin: ?

Photo by kind permission of © www.multicolour.com, David Weinberg.

Topaz "Swiss Blue"

Weight: 25.56 ct

Origin: Brazil

Photo by kind permission of © www.gemfrance.com, Dr. Laurent Sikirdji.

Topaz Ring

Photo by kind permission of © skywalker.cochise.edu, Roger Weller.

Topaz Pendant

Photo by kind permission of © skywalker.cochise.edu, Roger Weller.

Topaz "London Blue"

Weight: 49.30 ct

Origin: Brazil

Photo by kind permission of © www.gemfrance.com, Dr. Laurent Sikirdji.

Topaz Mineral

Origin: Zapot pegmatite / Gillis Range / Fitting Distr. / Mineral County / Nevada / USA

Photo by kind permission of © www.exceptionalminerals.com, Kevin Ward.

Topaz Mineral

Origin: Kuza / Jos Plateau / Nigeria

Photo by kind permission of © www.irocks.com, Dr. Robert Lavinsky.