Gemmology
English | Български
Where am I? > Home > Repository > Corundum


Gallery view selector

Colour selector
Simple colour schemeredorangey redreddish orangeorangeorangey yellowyellowgreenish yellowyellowish greenslightly yellowish greengreenvery slightly bluish greenbluish greenvery strongly bluish greengreen-blue or blue-greenvery strongly greenish bluevery slightly greenish bluebluevioletish bluebluish violetvioletbluish purplepurplereddish purplestrongly purplish redslightly purplish redcolourlessgreyblack

Corundum — specimens [gallery view]


Characteristic of Al-rich, Si-poor geological environments; in syenite and monzonite, and some quartz-free pegmatites; primary or a reaction product in eclogitic xenoliths in kimberlites. In regional or contact metamorphic aluminous rocks, and some advanced argillic and potassic hydrothermal alteration assemblages (Anthony et al., 2001—2005). Famous specimens: Black Star of Queensland, 733 carats from Australia, now owned by an unknown private party; Logan sapphire, 422.99 carats from Sri Lanka, in National Museum of Natural History, Smithsonian Institution, Washington.
Ruby — specimen 0147
0147
Mozambique
Ruby — specimen 0318
0318
Myanmar
Ruby — specimen 0276
0276
Tanzania
Ruby — specimen 0629
0629
Tanzania
Ruby — specimen 0654
0654
East Africa
Sapphire — specimen 0263
0263
Sri Lanka
Sapphire — specimen 0326
0326
Sri Lanka
Sapphire — specimen 0640
0640
Madagascar
Sapphire — specimen 0668
0668
Thailand
Sapphire — specimen 0646
0646
Madagascar

Corundum — specimens — 14
Page 1 of 2 Next Last