Xuan Loc (Huan Loc basalt lava field), Đồng Nai Province, Vietnam

70 km NW of Ho Chi Minh city.

Placer deposits of sapphire, transparent yellowish-brown zircon rest on the slopes and near the bases of volcanic cones.

The placer deposits are closely related to Quaternary (Holocene) trachybasalts, which contain nodules of olivinites. They rest on tholeiitic Neogene-Pleistocene basalt.

Ref: E.Ya. Kievlenko (2003) Geology of gems, p. 67

Gemstone List

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