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Green Mali garnet is a rare, collectible gemstone from Mali, West Africa, known for its high brilliance and vibrant, often minty green or yellowish-green hue. It is a hybrid of grossular and andradite garnets, which gives it a unique combination of a strong refractive index and high dispersion, similar to that of demantoid garnet. Although often found in alluvial deposits, the supply has diminished, increasing its value.

Key characteristics

Composition: A hybrid of grossular and andradite garnet.

Color: Primarily yellow, green, and brown, with mint green and yellowish-green being particularly desirable.

Origin: Discovered in Mali, West Africa, and is still the only known source.

Appearance: Features high brilliance and sparkle due to its andradite content.

Clarity: Often eye-clean, with visible inclusions typically lowering its value.

Size: Stones over 5 carats are uncommon.

Hardness: 7 on the Mohs hardness scale, making it durable for jewelry.

Durability: Suitable for all types of jewelry and not heat-sensitive, but should be cleaned with warm water, detergent, and a soft brush.

Value and rarity

Its unique blend of grossular and andradite, vibrant colors, and high dispersion makes it a highly valuable and sought-after gem.

Prices increase dramatically with size.

Supply has declined due to the difficult mining conditions in Mali, which has driven up its price.