inclusions

…how these gems are graded. For larger sized garnets, color and clarity have the greatest importance. Inclusions, tiny internal crystals and…

…help ensure maximum accuracy, follow these detailed procedures for refining your specific gravity testing techniques. [Reading time: 4…

…more about identifying natural diamonds, read about their inclusions. CVD Diamonds Chemical vapor deposition (CVD) diamonds come in sizes…

…isometric like all garnets, almandines may show anomalous double refraction (ADR) due to strain. Inclusions Usually eye clean, faceted almandines…

…as cabs. Some cabs may even show a “cat’s eye” effect, due to tubular inclusions within the stone. Although rubellites…

Varieties of Agate The color patterns in agates usually take the form of flat or concentric layers or bands. Mossy or dendritic inclusions can sometimes…

…polished, with a vitreous luster and some very small inclusions. With a microscope, you can see a fine fingerprint and some small, indistinguishable…

…show great transparency. Some specimens with small inclusions may be used for carving or cabochons. Small inclusions in large, dark stones…

…diamonds. Graphite is present as black inclusions. Pyrrhotite, pyrite, pentlandite, ilmenite, and rutile (darkcolored ore minerals) may…