Rock Identifier
Yellow Sapphire (Corundum (Al2O3)) — gemstone
gemstone

Yellow Sapphire

Corundum (Al2O3)

AI-generated identification · may be incorrect

Hardness of 9 on the Mohs scale, yellow color caused by trace iron, adamantine to vitreous luster, trigonal crystal system, and specific gravity of 4.0

Identified More gemstone →
Explore Yellow Sapphire in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

Physical properties

Hardness of 9 on the Mohs scale, yellow color caused by trace iron, adamantine to vitreous luster, trigonal crystal system, and specific gravity of 4.0

Formation & geological history

Formed under high-temperature and pressure conditions in metamorphic or igneous rocks like pegmatites and alkali basalts over millions of years

Uses & applications

Extensively used in high-end jewelry, luxury watches, and industrial abrasives or scientific viewports

Geological facts

Yellow sapphires are traditionally associated with prosperity and wisdom in Vedic astrology, representing the planet Jupiter

Field identification & locations

Identified by its high density, extreme scratch resistance, and characteristic yellow hues; found globally in Sri Lanka, Madagascar, and Australia