Mammoth ivory is the fossilised tusk material of the extinct woolly mammoth (Mammuthus primigenius) and related Pleistocene proboscideans, recovered principally from the permafrost of Siberia, Alaska and the Yukon. As a fossil material from a species extinct for approximately four thousand years, it falls outside the regulatory frameworks — the Convention on International Trade in Endangered Species (CITES) and the various national elephant ivory bans — that govern modern elephant material, though import and trade rules vary significantly by jurisdiction and the situation has tightened in recent years.

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Composition and structure

Chemically, mammoth ivory is hydroxyapatite (calcium phosphate) bound in collagen, structurally identical to elephant ivory. The diagnostic feature is the Schreger pattern — the cross-hatched lines visible on a polished cross-section, formed by the intersection of dentine tubule angles. In elephant ivory, the Schreger angles measure greater than 90 degrees on average (typically about 100–120 degrees); in mammoth ivory, they are less than 90 degrees (typically about 60–90 degrees). Forensic laboratories rely on this measurement, in conjunction with carbon-14 dating and stable-isotope analysis, to distinguish lawful mammoth from illicit elephant material.

Visually, mammoth ivory often shows mineralisation effects from millennia of burial. The exterior bark may be stained brown, grey-blue or reddish from contact with iron and manganese oxides in the surrounding sediment. The interior remains creamy white to pale yellow when fresh-cut, sometimes with internal cracks (the so-called bark cracks) caused by freeze-thaw cycles. Vivianite, a blue iron-phosphate mineral, occasionally penetrates the tusk and produces dramatic blue zones prized by carvers.

Trade and regulation

The Russian Republic of Yakutia (Sakha) is the principal source, with thousands of tonnes recovered annually from melting permafrost. Material is exported primarily to China, where it has historically supplied carvers serving demand that elephant ivory bans no longer permit. The 2018 Chinese domestic ivory ban exempted mammoth, and prices rose accordingly. In the United States, the federal Endangered Species Act does not regulate mammoth ivory, but several states (including California, New York, New Jersey and others) have passed laws restricting or banning its sale to prevent its use as a smokescreen for illicit elephant material. The European Union and United Kingdom currently allow mammoth ivory trade with documentation requirements that vary by member state. Buyers should confirm jurisdiction-specific rules before importing.

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Use in jewellery and carving

Mammoth ivory carves cleanly, accepts fine detail, and takes a high polish. It is used in netsuke, scrimshaw, gun grips, knife handles and jewellery — beads, pendants, cufflinks and small carved figures. Its fossil status carries no living-animal ethical concerns, which has made it a preferred substitute for collectors and craftsmen reluctant to handle modern ivory. As a working material, mammoth ivory is harder than fresh elephant ivory because of mineralisation, and selection of stable, uncracked stock is essential for fine work.