Corundum

Origin: Madagascar

Sample size: individual crystals up to 1.1 cm

 

  

Ruby

Origin: Budhipada, India

Sample size: 9 mm crystal

 

 

Sapphire

Origin: Ratnapura, Sri Lanka

Sample size: crystals 1.8 cm

 

  

Euhedral red to purplish red crystal.

Origin: District de Saovinandriana, Antananarvio Province, Madagascar

Sample size: 2 x 1.5 x 1 cm

 

Ruby

Origin: Burma

Ex. O'Donnell collection

Sample size: 2 x 0.6 x 0.9 cm

 

  

Origin:  Froland, Norway

Sample size: 4 x 3 x 2 cm

 

Photo courtesy of: 

Origin: Haramosh Mts., Baltistan, Northern Areas, Pakistan

Owner: Lou Perloff

Microscopic image

 

Origin: Ratnapura district, Sabaragamuwa Prov., Sri Lanka

Owner: Lou Perloff

Microscopic image

 

Corundum (ruby) on chromite (black)

Origin: Bayleaf, Wake Co., North Carolina, U.S.A.

Owner: Lou Perloff

Microscopic image

 

Photo courtesy of: 

Photo-Atlas of Minerals

  

Sapphire

Origin: Galbkka, near Vallivaya, Uva Province, Sri Lanka

Sample size: 21 x 18 x 45 mm

 

  

Corundum in zoisite

Origin: Tanzania

Sample size: 7 x 7.5 x 2.5 cm

 

Origin: Betroka, Madagascar

Sample size: The crystal on the right in the photo measures 21 x 20 x 15 mm; the one on the left measures 21 x 17 x 9 mm

 

  

Origin: Madagascar

Sample size: 18 x 6 x 28 mm

 

  

Corundum on calcite

Origin: Aliabad, Hunza Valley, Pakistan

Sample size: 3 x 3.5 x 4.5 cm

 

  

Origin: Lehigh Co., Pennsylvania, U.S.A.

Sample size: 17 x 15 x 9 mm

 

  

Variety sapphire

Origin: Australia

Sample size: 13 x 12 x 22 mm

 

Photo courtesy of: 

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