A) Diamond B) Sapphire C) Amethyst D) Topaz
A) Emerald B) Turquoise C) Amethyst D) Garnet
A) Feldspar B) Quartz C) Corundum D) Beryl
A) Star Sapphire B) Topaz C) Emerald D) Ruby
A) Emerald B) Opal C) Sapphire D) Peridot
A) Manganese impurities B) Iron impurities C) Copper impurities D) Titanium impurities
A) Jadeite Jade B) Black Jade C) Imperial Jade D) Nephrite Jade
A) Manganese B) Copper C) Iron D) Zinc
A) Demantoid B) Almandine C) Spessartite D) Rhodolite
A) The science dealing with natural and artificial gemstone materials. B) A financial study related to the trading of gemstones. C) A branch of biology that studies gems. D) An art form focused on creating jewelry from gems.
A) American Gem Society. B) Gemmological Association of Great Britain. C) The National Association of Goldsmiths of Great Britain (NAG). D) GIA.
A) 1908. B) 1925. C) 1931. D) 1947.
A) GIA founder. B) A member of NAG. C) Robert Shipley. D) Founder of American Gem Society.
A) Need for jewelry appraisal services. B) Development of the Mohs scale. C) The influx of newly developed 'cultured pearl' and advances in synthesis of rubies and sapphires. D) Demand for diamond certification.
A) The size of the gemstone. B) The weight of the gemstone. C) Understanding its atomic structure and identifying its origin. D) The color intensity alone.
A) Only the color of the gemstone. B) The historical significance of the gemstone. C) Factors like crystal structure, specific gravity, refractive index, and other optical properties. D) The market demand for that type of gemstone.
A) Gemological microscopic study of the internal structure, showing natural fluid inclusions or partially melted exogenous crystals. B) The market value. C) The weight of the gemstone. D) The color intensity alone.
A) Color filter B) Penlight C) Microscope D) Stone cloth
A) Polariscope B) Dichroscope C) Refractometer D) Spectroscope
A) The Verneuil process. B) Refractive index measurement. C) Specific gravity testing. D) Spectroscopy analysis.
A) Ultraviolet lamp B) FTIR spectrometer C) Refractometer D) Polariscope
A) Polariscope B) FTIR spectrometer C) EDXRF spectrometer D) Refractometer
A) Gemology Frontier. B) The Journal of Gemmology. C) Gems & Gemology. D) IGR – Rivista Italiana di Gemmologia.
A) They lack any internal structures. B) They are amorphous like glass. C) They show small flaws where the crystalline orientation changes abruptly. D) They have curved striations.
A) Determine the age of the gemstone. B) Measure the size of the gemstone. C) Identify the weight of the gemstone. D) Understand the atomic structure and identify its origin.
A) It will have definite internal and optical activity variance. B) They are identical in value. C) Thai rubies are more valuable. D) Myanmar rubies are always larger.
A) Optic figure sphere B) Dichroscope C) Penlight D) Contact liquid for RI
A) To store gemstones safely during transport. B) To display gemstones to potential buyers. C) To clean and polish gemstones. D) To perform analysis and estimation on site, independent from infrastructure.
A) Raman spectrometer B) Refractometer C) Polariscope D) Spectroscope
A) The market demand for that type of gemstone. B) The weight of the gemstone. C) The irregular Mohs scale of mineral hardness. D) The color intensity of the gemstone.
A) Identifying treatments to gems, new synthetics, and other new materials. B) Maintaining traditional gem cutting techniques. C) Finding enough raw gemstones. D) Training enough gemologists.
A) Based on their crystal structure, specific gravity, refractive index, and other optical properties. B) By the country of origin. C) According to their color alone. D) By their market value.
A) Raman spectrometer B) Photoluminescence spectroscopy system C) Ultraviolet lamp D) EDXRF spectrometer
A) Polariscope B) Refractometer C) Dichroscope D) Spectroscope
A) A natural pearl found in oysters. B) A newly developed type of pearl that prompted the establishment of the first gemological laboratory in London. C) An ancient method of polishing pearls. D) A synthetic diamond.
A) 5.6–5.9 B) 3.15–4.20 C) 1.81 D) 4.00
A) They show bands indicating which element colors the gem. B) They measure refractive index. C) They determine the specific gravity. D) They identify curved striations.
A) Polariscope B) Refractometer C) Spectroscope D) FTIR spectrometer
A) The angle at which a gemstone shows its cleavage planes. B) The angle above which light is reflected back internally within a gem. C) The angle at which a gemstone fractures. D) The angle at which a gemstone absorbs the most light.
A) A scale for measuring gemstone hardness. B) An optical property used in categorizing gemstones. C) A type of gemstone treatment. D) A method of cutting gemstones.
A) The size and weight of the stone. B) Market value and demand. C) The historical significance of the gemstone. D) Color, refractive index, optical character, specific gravity, and examination of internal characteristics under magnification.
A) Refractometer B) Polariscope C) Dichroscope D) Spectroscope |