Corundum

Variety sapphire in muscovite

Origin: Beit Bridge, Transvaal, South Africa

Ex. Marty Zinn collection

Sample size: 5.7 x 5.4 x 2.2 cm

Variety sapphire

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

Sample size: 2.3 x 1.2 x 1.1 cm

Sapphire twin

Origin: Eheliyagoda, near Ratnapura, Sri Lanka

Sample size: 3.9 x 2.5 x 1.4 cm

Variety sapphire

Origin: Amboharony, Ihosy, Madagascar

Sample size: 6.2 x 5.2 x 2.6 cm

Variety ruby on calcite

Variety ruby on marble

Origin: Mogok, Mandalay, Burma

Sample size: 3.1 x 2.7 x 2.2 cm (top/2nd row), 5.5 x 5.5 x 4.2 cm (3rd/bottom row)

Photo courtesy of:

Rob Lavinsky

SEM images

TEM images

vibrational spectra description

IR spectra

N-IR spectra

F-IR spectra

IES spectra