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Inclusions of fossil plant debris in opal from Wollo, Ethiopia
Colour zoning in ruby from Mong-Shu, Burma
Inclusions of gilalite aggregates in rock crystal from Brazil
Structure in a healing fissure in topaz from Brazil
Two-phase inclusions in tourmaline from Namibia
Spinel crystal in dolomite marble, Burma
Two-phase inclusion in amethyst, Brazil
Inclusions of rock crystal and rutile needles in quartz, Brazil, polarised light

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  • Gemmology
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    • The 4 C's
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    • Colours
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