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種類

Article (765)Exhibit (1)Reference (57)Report (3)Resource (1)

gemstonesSpecies

Amber (5)Andradite (1)Benitoite (1)Beryl (17)Chrysoberyl (6)Chrysocolla (1)Coral (1)Cordierite (4)Corundum (18)Diamond (29)Dravite (1)Fluorite (1)Hematite (1)Jadeite (7)Labradorite (7)Lazurite (4)Opal (6)Orthoclase (3)Pearl (16)Peridot (4)Phenakite (1)Pyrope (1)Quartz (23)Spinel (5)Spodumene (5)Topaz (5)Tourmaline (4)Turquoise (4)Zircon (4)Zoisite (4)

宝石

Alexandrite (7)Amber (9)Amethyst (17)Ametrine (4)Aquamarine (9)Citrine (6)Diamond (114)Diamond Fancy Color (14)Emerald (30)Garnet (8)Iolite (4)Jade (8)Kunzite (6)Lapis Lazuli (4)Moonstone (4)Morganite (6)Opal (15)Pearl (19)Peridot (7)Rose Quartz (4)Ruby (39)Sapphire (52)Spinel (14)Sunstone (8)Tanzanite (7)Topaz (13)Tourmaline (12)Turquoise (5)Zircon (6)

年

Abstract (5)Alumni Association (6)Alumni Spotlight (21)Analysis (1)Bibliography (1)Book Review (11)Chart (1)Diamonds From The Deep (1)Editorial (1)Feature (126)Field Report (28)Gem News International (21)Gems Gemology (9)Industry Analysis (30)Lab Notes (26)Micro World (2)Notes Techniques (4)Overview (6)Peer Reviewed (1)Profile (2)Research News (42)Reviews (7)The Story Behind The Story (4)

coverageCountry

Australia (4)Botswana (2)Brazil (1)China (1)India (2)South Africa (1)United States Of America (4)Vietnam (1)

トピック

Announcements (19)Chemical Composition (5)Clarity (2)Color (5)Cut (3)Design (6)Education (5)Enhancement (1)Fashion (1)Formation (1)Gemology (25)Geology (3)Grading (1)History (20)Identification (6)In Memoriam (1)Inclusions (5)Instrumentation (1)Jewelry (7)Localities (25)Material Properties (1)Mineralogy (3)Mining (8)Optical Effects (1)Optical Properties (1)Other Research Publications (2)Research (1)Synthetics (29)Techniques (1)Technology (2)Trade (18)Treatment Process (2)

coverageState

California (1)Montana (4)

coverageCity

Carlsbad (2)Gaborone (1)Jaipur (2)

secondarySubject

Assembled Stone (3)Carat Weight (11)Care (21)Chemical Composition (20)Clarity (17)Color (39)Crystal Structure (12)Cut (13)Design (44)Education (61)Enhancement (7)Faceting (11)Fashion (24)Folklore (10)Formation (19)Gemology (109)Geology (37)Grading (12)History (79)Identification (34)Imitations (7)Inclusions (20)Instrumentation (11)Jewelry (75)Localities (87)Manufacturing (26)Material Properties (13)Metals (11)Mineralogy (8)Mining (78)Ongoing Research (49)Optical Effects (8)Optical Properties (12)Organics (16)Other Research Publications (1)Physical Properties (27)Precious Metals (7)Pricing (11)Quality Factors (30)Recent Findings (10)Research (1)Simulants (2)Synthesis Process (14)Synthetics (21)Techniques (20)Technology (16)Tools (5)Trade (62)Travel (24)Treatment Process (24)

contentSubType

About GIA (5)Abstract (6)Advice (12)Alumni Association (28)Alumni Spotlight (14)Analysis (40)Bibliography (21)Biography (5)Book Review (14)Chart (1)Cover Story (1)Diamonds From The Deep (1)Editorial (18)Education Quarterly Article (1)Exhibit Current (7)Exhibit Past (1)Exhibit Upcoming (1)Feature (52)Field Report (9)Gem Facts (153)Gem News International (21)Gems Gemology (43)Industry Analysis (34)Lab Notes (33)Microworld (2)Museum Collection (5)News (30)Notes Techniques (3)Overview (13)Peer Reviewed (59)Profile (1)Research Field Gemology (14)Research G G (2)Research News (283)Research Publications (10)Research Scientific Equipment Techniques (4)Spotlight (3)The Story Behind The Story (1)

tertiarySubject

Carat Weight (1)Care (20)Chemical Composition (2)Color (4)Crystal Structure (6)Cut (3)Design (5)Education (7)Enhancement (3)Faceting (5)Fashion (3)Folklore (2)Formation (4)Gemology (27)Geology (3)History (15)Identification (9)Imitations (1)Inclusions (3)Instrumentation (2)Jewelry (8)Localities (9)Manufacturing (11)Material Properties (2)Metals (3)Mining (11)Optical Effects (3)Optical Properties (2)Other Research Publications (1)Physical Properties (7)Precious Metals (5)Pricing (4)Quality Factors (24)Simulants (2)Synthesis Process (5)Synthetics (7)Techniques (5)Technology (9)Tools (4)Trade (15)Travel (4)Treatment Process (4)

gemstonesGroup

Apatite (1)Feldspar (13)Garnet (15)Jade (14)Olivine (5)Tourmaline (19)

gemstonesVariety

Agalmatolite (3)Agate (3)Alexandrite (8)Amethyst (14)Ametrine (5)Ammolite (1)Aquamarine (7)Carnelian (3)Chalcedony (7)Chrome Diopside (1)Citrine (15)Demantoid (1)Emerald (15)Fire Agate (4)Heliodor (3)Hessonite (3)Indicolite (5)Jasper (4)Kunzite (7)Lapis Lazuli (10)Marble (1)Moonstone (9)Morganite (3)Nephrite (3)Onyx (3)Padparadscha (3)Peridot (7)Rock Crystal (2)Rose Quartz (6)Ruby (29)Sapphire (29)Smoky Quartz (3)Sunstone (8)Tanzanite (11)Tsavorite (1)

gemstonesQualifier

American (5)Ametrine (11)Cat S Eye (6)Chrome (3)Color Change (4)Crystal (6)Eqyptian (1)Fancy (3)Fire (1)Glass (4)Golden (4)Larimar (2)Matrix (4)Opalized (1)Parti Colored (5)Persian (3)Rose (4)Rutilated (6)Watermelon (1)

gemstoneElement

Aluminum (6)Beryllium (5)Boron (1)Calcium (8)Carbon (7)Chromium (6)Cobalt (1)Copper (8)Gold (9)Iron (9)Manganese (9)Oxygen (17)Platinum (3)Silicon (17)Sodium (4)Titanium (5)Vanadium (2)

gemstoneTreatment

Coating (9)Diffusion (2)Dyeing And Staining (8)Foil Backing (1)Fracture Filling (5)Heating (33)Impregnation (4)Irradiation (17)Oiling (1)Waxing (8)

gemstoneOpticalProperties

Absorption Spectrum (2)Adamantine (1)Adularescence Schiller (1)Alexandrite Effect (1)Allochromatic (5)Asterism (5)Aventurescence (2)Brilliance (4)Chatoyancy (13)Color Change (30)Dichroic (2)Diffraction (1)Dispersion (1)Doubly Refractive (18)Fire Dispersion (6)Fluorescence (1)Iridescence (2)Labradorescence (1)Luster (1)Metallic (4)Multicolored (8)Opaque (4)Particolored (10)Phenomenal (11)Play Of Color (3)Pleochroic (17)Refractive Index (21)Scintillation (4)Sheen (4)Translucent (8)Transparent (19)Vitreous (13)Waxy (1)

gemstoneStructure

Amorphous (1)Cleavage (13)Conchoidal (8)Crystal Habit (5)Crystal Structure (15)Crystalline (9)Durability (12)Fracture (8)Hardness (22)Inclusion (12)Optic Axis (4)Specific Gravity (16)Three Phase Inclusion (12)Toughness (12)

gemstoneCrystalGroup

Cubic (10)Hexagonal (19)Monoclinic (9)Orthorhombic (14)Tetragonal (3)Triclinic (8)Trigonal (9)

gemstoneColor

Black (17)Blue (66)Brown (29)Colorless (35)Gray (27)Green (60)Multicolored (22)Orange (40)Pink (43)Purple (43)Red (49)White (9)Yellow (41)

gemstoneFacet

Bezel (8)Crown (10)Culet (12)Finish (13)Girdle (10)Girdle Diameter (8)Lower Girdle (8)Make (9)Pavilion (11)Pavilion Mains (9)Polish (10)Proportions (12)Star (8)Symmetry (9)Table (14)Total Depth (9)

gemstoneFormation

Alluvial (7)Geode (4)Hydrothermal (4)Igneous (5)Inorganic (5)Metamorphic (8)Organic (3)Pegmatite (13)Placer (1)Primary Deposit (5)Rock (4)Rough (28)Secondary Deposit (2)Sedimentary (1)Surface Weathering (1)Volcanic (4)

gemstoneCut

Baguette (1)Bead (10)Brillant (20)Briolette (2)Buff Top (1)Cabochon (26)Cameo (1)Carving (19)Cushion (7)Cushion Cut (5)Cut Corner (9)Emerald (17)Faceted (21)Mixed (6)Modified (1)Octagon (5)Old European (1)Old Mine (1)Rough (12)Sphere (5)Step (13)Table (8)Tablet (8)Trilliant (4)Tumbled (10)

gemstoneShape

Fancy (26)Heart (16)Marquise (16)Oval (27)Pear (20)Rectangle (20)Round (38)Square (16)Triangle (18)

gemstonesFilters2

Alexandrite (6)Amber (4)Amethyst (10)Ametrine (3)Aquamarine (14)Citrine (2)Diamond (64)Diamond Fancy Color (41)Emerald (29)Garnet (19)Iolite (1)Jade (14)Lapis Lazuli (1)Moonstone (12)Morganite (6)Opal (19)Pearl (46)Peridot (10)Rose Quartz (3)Ruby (59)Sapphire (51)Spinel (16)Sunstone (6)Tanzanite (15)Topaz (17)Tourmaline (34)Turquoise (9)Zircon (6)

兼讀課程

February 2, 2026

認證和認可

February 2, 2026

入學要求

February 2, 2026

應用珠寶家課程

February 2, 2026

安娜‧馬丁（Anna Martin）將於GIA榮休

February 2, 2026

Anna Martin to Retire from GIA

企業培訓

February 2, 2026

遙距課程

February 2, 2026

Designed for Working Professionals

教學理念

February 2, 2026

英語水平的學歷文件

February 2, 2026

GIA 推出新的鑽石原產地證書

February 2, 2026

CARLSBAD, Calif. – March 28, 2019 – On April 30, GIA will introduce the GIA Diamond Origin Report service which will confirm the country of origin of polished diamonds.