Seahorse teeth, that is, sea ivory, refer to the teeth of walruses in the Arctic Ocean, which can be carved as works of art, such as boxes and pendants. Sea ivory mainly comes from the sea near the Arctic Ocean. The long teeth (maxillary fangs) of Odobenidae are usually 0.5 ~ 1 m long, and the cross section is flat and trilobal, mostly yellowish cream-colored. The texture is rougher than ivory and hippopotamus teeth, and the inner core is loose, which is close to ordinary bones.

Sea ivory, English name walrusivory? Pinnipedia's Pinnipedia? The tusks (maxillary fangs) of walruses of Odobenidae are flat, with three cross sections, mostly pale yellow and cream-colored, which are rougher in texture than ivory and hippopotamus teeth, and the inner core is close to ordinary bones. The relative density is 1.90 ~ 2.00, the refractive index is 1.55 ~ 1.57 and the hardness is 2.5 ~ 2.55. Persians often make hilts, while Scandinavians often make chess pieces and jewelry boxes. Sea ivory mainly comes from the sea near the Arctic Ocean.

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The undyed sea ivory has brain-flower-like lines, which are different from ivory. The process of dyeing sea ivory green is unique to the Qing Dynasty. The products made include cigarette holders, rakes, seals, gourd small mouth covers, eye masks, air holes and other small objects. By the Qing Dynasty, this craft was not backward, and spread to the people, only a few craftsmen knew it. Up to now, this craft has almost disappeared.

Sea ivory is not suitable for making beautifully carved large pieces, and is often used to make seals. So the price difference between ivory and sea ivory is generally more than 5 times. However, due to the small amount of the world, sea ivory is gradually discovered by curious literature lovers, and the price is also rising all the way.

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