Formula: Ca₂Al₃(SiO₄)₃(OH)
Mineral class: silicates
Crystal system: orthorhombic
Mohs scale: 6.5
Density (g/cm³): 3.3
Cleavage: different
Colors: colorless, grey, green, rose, red, blue, violet, brown
Luster: vitreous
Fluorescence: -
Pleochroism: see Tanzanite
Largest Zoisite: 10 cm?
Deposits: worldwide
Discovery: 1805
1st Description: 1892

Zoisite Mineral

Origin: Alchuri / Shigar Valley / Skardu Distr. / Pakistan

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

Zoisite

Weight: 1.25 ct

Origin: Pakistan

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

Zoisite Mineral

Size: 1.3 x 0.5 x 0.5 cm

Origin: Alchuri / Shigar Valley / Skardu Distr. / Pakistan

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

Zoisite Mineral

Origin: Nuristan / Afghanistan

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

Zoisite

Weight: 1.40 ct

Origin: Pakistan

Photo by kind permission of © rock-logic.tripod.com/, Alexandra Woodmansee.

Zoisite Mineral with Ruby

Origin: Tanzania

Photo by kind permission of © www.mineraltivadar.fw.hu, Tivadar Pécsi.

Zoisite with Ruby

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

Zoisite Var. Thulite Mineral

Origin: Kleppan / Sauland / Hjartdal / Telemark / Norway

Photo by kind permission of © António Manuel Ináçio Martins.

Zoisite Var. Thulite

Size: 18 x 13 mm

Origin: Kleppan / Sauland / Hjartdal / Telemark / Norway

Photo by kind permission of © www.edelsteine.at, Wiener Edelsteinzentrum.

Zoisite Var. Thulite

Size: 18 x 13 mm

Origin: Kleppan / Sauland / Hjartdal / Telemark / Norway

Photo by kind permission of © www.edelsteine.at, Wiener Edelsteinzentrum.

Zoisite Mineral (colorless Tanzanite)

Size: 1.4 x 1.0 x 0.6 cm

Origin: Merelani / Tanzania

Photo by kind permission of © www.collectorfinejewelry.com, The Collector Fine Jewelry.

Zoisite Mineral (yellow Tanzanite)

Size: 2.8 x 0.85 x 0.75 cm

Origin: Merelani / Tanzania

Photo: John McLean, by kind permission of © www.palagems.com, Bill Larson.

Zoisite (yellow Tanzanite)

Weight: 9.47 ct

Origin: Merelani / Tanzania

Photo: John McLean, by kind permission of © www.palagems.com, Bill Larson.

Zoisite Mineral (green Tanzanite)

Origin: Merelani Mine / Umba Valley / Arusha / Simanjiro Distr. / Tanzania

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

Zoisite Mineral (green Tanzanite)

Origin: Merelani Mine / Umba Valley / Arusha / Simanjiro Distr. / Tanzania

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

Zoisite (green Tanzanite)

Weight: 0.46 ct

Origin: Tanzania

Photo by kind permission of © rock-logic.tripod.com/, Alexandra Woodmansee.

Zoisite (green Tanzanite)

Weight: 0.87 ct

Origin: Tanzania

Photo by kind permission of © www.thegemtrader.com, Brad Payne.

Zoisite (green Tanzanite)

Weight: 2.7 ct

Origin: Merelani Mine / Umba Valley / Arusha / Simanjiro Distr. / Tanzania

Photo by kind permission of www.greatcabochons.com, © ColorWright.

Zoisite (rose Tanzanite)

Weight: 0.51 ct

Origin: Tanzania

Photo by kind permission of © www.thegemtrader.com, Brad Payne.

Zoisite (rose Tanzanite)

Weight: 3.30 ct

Origin: Merelani Mine / Umba Valley / Arusha / Simanjiro Distr. / Tanzania

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

Zoisite 2 colors

Weight: 1.22 ct

Origin: Tanzania

Photo by kind permission of © www.thegemtrader.com, Brad Payne.