Tangerine Tourmaline

Tangerine Tourmaline is a trade name for elbaite displaying a bright, citrusy orange, like the skin of a tangerine. Orange is one of the rarer tourmaline hues; it generally arises from manganese, sometimes with iron contributing warmth, and occasionally appears after heat treatment of certain pink or brown stones.

Vivid, pure-orange stones are scarce and sought after, while many oranges lean toward brownish or pinkish tones.

It is a lithium-rich elbaite with the trigonal crystal structure and prismatic, lengthwise-striated habit shared across the tourmaline group.

Tangerine tourmaline forms in lithium- and manganese-bearing granite pegmatites, where the final boron-rich fluids of a granitic melt crystallize gem elbaite in open pockets. Manganese is the principal source of the orange-to-pink coloration, with iron sometimes adding warmth.

Some orange tourmalines develop or intensify their color through controlled heating, a routine and disclosed treatment. Truly vivid, untreated tangerine stones are uncommon.

Sources include Brazil, Madagascar, Mozambique, Nigeria, Tanzania, and Afghanistan, the same colorful elbaite pegmatite regions that produce pink and bicolor tourmaline.

Look for a bright orange body color, hardness 7-7.5, vitreous luster, and white streak. Pleochroism often shows two tones (for example orange and a lighter yellow or pink) when the stone is rotated.

Rough prisms display lengthwise striations and rounded triangular cross-sections; strong birefringence can double facet edges in clean stones.

Tangerine tourmaline can resemble spessartite garnet, hessonite, or orange sapphire. Garnet is singly refractive (no doubling, no pleochroism), and sapphire is much harder and denser, so optical tests readily separate them; refractometer readings near 1.62-1.64 with strong birefringence confirm tourmaline.

Tangerine tourmaline is a faceted gemstone valued for its rare, lively orange. It makes vivid rings, pendants, and earrings, and pairs strikingly with warm metals.

Because pure orange tourmaline is uncommon, fine stones command good prices and interest collectors. Its hardness supports everyday jewelry use.

Metaphysically, orange tourmaline is associated with creativity and the sacral chakra, a spiritual rather than scientific attribute. As with other warm tourmalines, any heat treatment should be disclosed.