Rock Identifier
Ambergris (Ambra grisea) — Organic (often found by beachcombers)
Organic (often found by beachcombers)

Ambergris

Ambra grisea

Hardness (Mohs scale): 1; Color: Grey, black, or earthy brown; Luster: Waxy to resinous; Structure: Amorphous; Odor: Pungent when fresh, musky and sweet when aged; Specific Gravity: 0.7-0.9 (floats in water).

Color
Grey, black, or earthy brown
Luster
Waxy to resinous
Identified More organic (often found by beachcombers) →

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Physical properties

Hardness (Mohs scale): 1; Color: Grey, black, or earthy brown; Luster: Waxy to resinous; Structure: Amorphous; Odor: Pungent when fresh, musky and sweet when aged; Specific Gravity: 0.7-0.9 (floats in water).

Formation & geological history

Produced in the digestive system of sperm whales (Physeter macrocephalus) as a secretion to protect the gut from squid beaks. It floats in ocean currents for years, undergoing oxidative aging before washing ashore.

Uses & applications

Historically used as a fixative in luxury perfumes to preserve fragrance longevity and as a rare ingredient in traditional medicine and cuisine.

Geological facts

Also known as 'floating gold,' ambergris has been used since ancient times. It has a low melting point (approx 62 degrees celsius) and is highly flammable.

Field identification & locations

Identify in the field by its waxy texture, ability to float, and its distinct scent when touched with a hot needle (it should melt into a black liquid and emit a musky aroma). Often found on coastlines after storms.

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