Pink Coral

Physical Properties

Hardness: 3.5-4.0 (Mohs); Color: Pale pink to salmon; Luster: Vitreous/waxy; Crystal Structure: Trigonal (microcrystalline); Cleavage: None; Specific Gravity: 2.6-2.7

Formation & Geological History

Organic origin formed by sea polyps in deep ocean environments. Ancient reefs can date back millions of years, often sourced from the Mediterranean or Japanese waters.

Uses & Applications

Primarily used in jewelry (beads, cabochons, carvings) and as decorative collectibles. Historically used in amulets.

Geological Facts

Coral is an organic gemstone, meaning it is produced by a living organism rather than a geological process. Precious pink coral is slow-growing and often protected by international laws (CITES).

Field Identification & Locations

Identify by looking for a faint wood-grain or wavy fibrous pattern under magnification; it will react (effervesce) with weak acid like vinegar due to its calcium carbonate base.

Identified on: 4/17/2026

Mode: Standard