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Chalcedony

Bloodstone

Dark opaque green with characteristic red to orange-red spots

Green Red-Spotted
Optical properties

Optical characteristics

Ref. index
1.53 – 1.543
Birefringence
0.004
Luster
Waxy
Pleochroism
None None.
Fluorescence
Inert.
Origins

Source localities

Brazil Brazil: Minas Gerais / Paraíba / Bahia
Significant

Major source for beryl, tourmaline, quartz, topaz, chrysoberyl and rare minerals.

22% est. supply
Australia Australia: New South Wales / Queensland fields
Commercial

Commercial sapphire and opal source; many darker blue to blue-green sapphires.

18% est. supply
India India: Rajasthan / Odisha / Karnataka
Significant ★ Top Source

Historic and modern source for garnet, moonstone, corundum and other gems; Kathiawar material is considered finest.

40% est. supply
United States USA: major gem fields
Commercial

Diverse sources for turquoise, tourmaline, opal, sapphire, topaz, red beryl and rare minerals.

12% est. supply
China China: Xinjiang / Yunnan / Hubei
Commercial

Known for jade, turquoise, quartz and multiple gem deposits.

8% est. supply
Inclusions

Inclusions & features

Zoning Color Zoning Under 10x loupe in immersion: bands or patches of deeper or lighter color arranged… Clouds Pinpoint Clouds Under 10x loupe: concentrations of extremely tiny bright dots that individually are too small…
Identification

Instruments used

10x Loupe Your most-used instrument, start every examination here High CRI Penlight Tiny concentrated white spot for field checks, inclusions, fire, and fractures Hydrostatic Scale Measures specific gravity, works even on opaque stones