Characteristic features in ornamental materials Crystalline character in isotropic, anisotropic and Characteristic features in organic materials aggregate materials. Interference figures. Observation by gemmological microscope Inclusions in cut and polished gemstones. Spectroscope Identification of gemstone species and variety. Characteristic absorption spectra in gemstones Distinguish natural gemstones from synthetics. related to the syllabus. Detecting treatments and composites Dichroscope Dichroism in coloured mono-crystalline materials Chelsea Colour Filter Refractometer Colour effects fluorescence in some gemstones Measurement of refractive indices (RI) and birefringence (DR) to 3rd decimal place Ultra Violet Light Identification of optic character and optic sign. Colour effects fluorescence in some gemstones Measurement of RI by distant vision method Specific Gravity Polariscope and conoscope S.G. measurement and weigh estimation in gems Observation and testing of the following gemstones with all gemmological instruments as required Inorganic Gemstones and Synthetics Fluorite Quartz group Actinolite Garnet group Rhodochrosite Ambligonite Glass- artificial Rhodonite Andalusite Glass - natural Scapolite Apatite Gypsum (including alabaster) Scheelite Axinite Serpentine (including bowenite) Benitoite Hematite Sillimanite Beryl Idocrase Sinhalite Calcite Iolite, Sodalite Cassitarite Jadeite Sphene Chrysoberyl, Kornerupine Corundum Kyanite Spinel Cubic Zirconia Lapis Lazuli Spodumene Danburite, Malachite Steatite (soapstone) Diamond, Nephrite Strontium Titanate Diopside Opal, Synthetic Moissanite Enstatite Peridot Synthetic Rutile Ekanite Phenakite Taaffeite Feldspar group Pyrite Tanzanite (Zoisite)
Characteristic features in ornamental materials Characteristic features in organic materials Observation by gemmological microscope Inclusions in cut and polished gemstones. Identification of gemstone species and variety. Distinguish natural gemstones from synthetics. Detecting treatments and composites Refractometer Measurement of refractive indices (RI) and birefringence (DR) to 3rd decimal place Identification of optic character and optic sign. Measurement of RI by distant vision method Polariscope and conoscope Crystalline character in isotropic, anisotropic and aggregate materials. Interference figures. Spectroscope Characteristic absorption spectra in gemstones related to the syllabus. Dichroscope Dichroism in coloured mono-crystalline materials Chelsea Colour Filter Colour effects fluorescence in some gemstones Ultra Violet Light Colour effects fluorescence in some gemstones Specific Gravity S.G. measurement and weigh estimation in gems Observation and testing of the following gemstones with all gemmological instruments as required Inorganic Gemstones and Synthetics Actinolite Ambligonite Andalusite Apatite Axinite Benitoite Beryl Calcite Cassitarite Chrysoberyl, Corundum Cubic Zirconia Danburite, Diamond, Diopside Enstatite Ekanite Feldspar group Fluorite Garnet group Glass- artificial Glass - natural Gypsum (including alabaster) Hematite Idocrase Iolite, Jadeite Kornerupine Kyanite Lapis Lazuli Malachite Nephrite Opal, Peridot Phenakite Pyrite Quartz group Rhodochrosite Rhodonite Scapolite Scheelite Serpentine (including bowenite) Sillimanite Sinhalite Sodalite Sphene Spinel Spodumene Steatite (soapstone) Strontium Titanate Synthetic Moissanite Synthetic Rutile Taaffeite Tanzanite (Zoisite)
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