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Article (684)Exhibit (1)Reference (119)Report (3)Resource (1)

gemstonesSpecies

Amber (3)Andradite (1)Benitoite (1)Beryl (8)Chrysoberyl (2)Chrysocolla (1)Coral (1)Cordierite (1)Corundum (16)Diamond (33)Dravite (1)Fluorite (1)Hematite (1)Jadeite (7)Labradorite (3)Lazurite (1)Opal (2)Pearl (14)Peridot (1)Phenakite (1)Pyrope (1)Quartz (11)Spinel (4)Spodumene (3)Topaz (1)Tourmaline (1)Zircon (1)Zoisite (2)

宝石

Alexandrite (3)Amber (6)Amethyst (15)Ametrine (1)Aquamarine (5)Citrine (2)Diamond (121)Diamond Fancy Color (15)Emerald (25)Garnet (8)Iolite (1)Jade (6)Kunzite (4)Lapis Lazuli (1)Morganite (2)Opal (12)Pearl (17)Peridot (4)Rose Quartz (1)Ruby (39)Sapphire (49)Spinel (15)Sunstone (4)Tanzanite (4)Topaz (9)Tourmaline (10)Turquoise (1)Zircon (3)

年

Abstract (5)Alumni Association (8)Alumni Spotlight (22)Analysis (1)Bibliography (1)Book Review (14)Chart (1)Diamonds From The Deep (1)Editorial (1)Feature (130)Field Report (28)Gem News International (22)Gems Gemology (11)Industry Analysis (30)Lab Notes (28)Micro World (2)Notes Techniques (5)Overview (5)Peer Reviewed (1)Profile (2)Research News (46)Reviews (5)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)

主题

Announcements (55)Chemical Composition (5)Clarity (2)Color (6)Cut (3)Design (9)Education (10)Enhancement (2)Fashion (1)Formation (1)Gemology (29)Geology (3)Grading (5)History (27)Identification (6)In Memoriam (1)Inclusions (5)Instrumentation (1)Jewelry (5)Localities (25)Manufacturing (1)Material Properties (1)Mineralogy (3)Mining (10)Ongoing Research (1)Optical Effects (1)Optical Properties (2)Other Research Publications (2)Recent Findings (1)Research (2)Synthetics (31)Techniques (1)Technology (3)Trade (24)Treatment Process (2)

coverageState

California (1)Montana (4)

coverageCity

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

secondarySubject

Assembled Stone (3)Carat Weight (12)Care (4)Chemical Composition (20)Clarity (20)Color (42)Crystal Structure (12)Cut (15)Design (43)Education (47)Enhancement (7)Faceting (13)Fashion (23)Folklore (9)Formation (20)Gemology (84)Geology (38)Grading (13)History (75)Identification (33)Imitations (6)Inclusions (21)Instrumentation (12)Jewelry (67)Localities (90)Manufacturing (30)Material Properties (15)Metals (13)Mineralogy (8)Mining (79)Ongoing Research (50)Optical Effects (9)Optical Properties (13)Organics (17)Other Research Publications (1)Physical Properties (27)Precious Metals (7)Pricing (11)Quality Factors (27)Recent Findings (10)Research (1)Simulants (2)Synthesis Process (14)Synthetics (19)Techniques (22)Technology (16)Tools (6)Trade (62)Travel (25)Treatment Process (23)

contentSubType

About GIA (5)Abstract (6)Advice (5)Alumni Association (30)Alumni Spotlight (14)Analysis (40)Bibliography (25)Biography (5)Book Review (15)Chart (1)Cover Story (1)Diamonds From The Deep (1)Editorial (21)Education Quarterly Article (1)Exhibit Current (7)Exhibit Past (1)Exhibit Upcoming (1)Feature (53)Field Report (10)Gem Facts (57)Gem News International (22)Gems Gemology (45)Industry Analysis (34)Lab Notes (35)Microworld (2)Museum Collection (5)News (30)Notes Techniques (4)Overview (14)Peer Reviewed (61)Profile (1)Research Field Gemology (14)Research G G (2)Research News (291)Research Publications (11)Research Scientific Equipment Techniques (4)Spotlight (3)The Story Behind The Story (1)Update (1)

tertiarySubject

Carat Weight (1)Care (3)Chemical Composition (2)Color (4)Crystal Structure (6)Cut (3)Design (5)Education (3)Enhancement (3)Faceting (5)Fashion (3)Folklore (2)Formation (4)Gemology (32)Geology (3)History (10)Identification (9)Imitations (1)Inclusions (3)Instrumentation (2)Jewelry (8)Localities (9)Manufacturing (11)Material Properties (2)Metals (3)Mining (12)Optical Effects (3)Optical Properties (2)Other Research Publications (1)Physical Properties (7)Precious Metals (5)Pricing (4)Quality Factors (20)Simulants (2)Synthesis Process (4)Synthetics (8)Techniques (5)Technology (9)Tools (5)Trade (16)Travel (4)Treatment Process (5)

gemstonesGroup

Apatite (1)Feldspar (7)Garnet (16)Jade (13)Olivine (2)Tourmaline (17)

gemstonesVariety

Agalmatolite (1)Agate (3)Alexandrite (5)Amethyst (10)Ametrine (2)Ammolite (1)Aquamarine (3)Aventurine (1)Bloodstone (1)Carnelian (3)Chalcedony (8)Chrome Diopside (1)Chrysoprase (1)Citrine (8)Demantoid (3)Emerald (14)Fire Agate (4)Heliodor (3)Hessonite (3)Hiddenite (1)Indicolite (2)Jasper (4)Kunzite (5)Lapis Lazuli (7)Marble (1)Maw Sit Sit (1)Moonstone (5)Morganite (1)Nephrite (3)Onyx (3)Padparadscha (3)Peridot (6)Rock Crystal (2)Rose Quartz (3)Ruby (27)Sapphire (30)Smoky Quartz (3)Sunstone (4)Tanzanite (7)Tsavorite (2)

gemstonesQualifier

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

gemstoneElement

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

gemstoneTreatment

Coating (2)Diffusion (2)Dyeing And Staining (1)Foil Backing (1)Fracture Filling (2)Heating (11)Irradiation (6)Oiling (1)Waxing (1)

gemstoneOpticalProperties

Absorption Spectrum (2)Adamantine (1)Asterism (2)Aventurescence (1)Brilliance (4)Chatoyancy (4)Color Change (15)Dichroic (1)Diffraction (1)Dispersion (1)Doubly Refractive (4)Fire Dispersion (4)Fluorescence (1)Iridescence (2)Labradorescence (1)Luster (1)Metallic (1)Multicolored (1)Opaque (1)Particolored (3)Phenomenal (4)Play Of Color (3)Pleochroic (7)Refractive Index (4)Scintillation (4)Translucent (1)Transparent (7)Vitreous (4)

gemstoneStructure

Amorphous (1)Cleavage (4)Crystal Habit (1)Crystal Structure (8)Crystalline (2)Durability (2)Fracture (1)Hardness (5)Inclusion (5)Specific Gravity (3)Three Phase Inclusion (3)Toughness (2)

gemstoneCrystalGroup

Cubic (5)Hexagonal (5)Monoclinic (3)Orthorhombic (6)Tetragonal (1)Trigonal (2)

gemstoneColor

Black (13)Blue (40)Brown (12)Colorless (25)Gray (14)Green (37)Multicolored (12)Orange (20)Pink (24)Purple (23)Red (29)White (7)Yellow (19)

gemstoneFacet

Bezel (1)Crown (3)Culet (2)Finish (3)Girdle (3)Girdle Diameter (1)Lower Girdle (1)Make (2)Pavilion (4)Pavilion Mains (2)Polish (3)Proportions (5)Star (1)Symmetry (2)Table (4)Total Depth (2)

gemstoneFormation

Alluvial (5)Geode (1)Hydrothermal (1)Igneous (2)Inorganic (2)Metamorphic (3)Organic (2)Pegmatite (5)Placer (1)Primary Deposit (2)Rock (1)Rough (15)Secondary Deposit (2)Sedimentary (1)Surface Weathering (1)

gemstoneCut

Baguette (1)Bead (4)Brillant (13)Briolette (2)Buff Top (1)Cabochon (12)Cameo (1)Carving (5)Cushion (3)Cushion Cut (1)Cut Corner (2)Emerald (3)Faceted (6)Mixed (3)Modified (1)Octagon (2)Old European (1)Old Mine (1)Rough (1)Sphere (2)Step (3)Table (1)Tablet (1)Trilliant (1)Tumbled (3)

gemstoneShape

Fancy (9)Heart (6)Marquise (6)Oval (11)Pear (6)Rectangle (6)Round (21)Square (6)Triangle (8)

gemstonesFilters2

Alexandrite (3)Amber (1)Amethyst (9)Ametrine (3)Aquamarine (10)Citrine (2)Diamond (68)Diamond Fancy Color (42)Emerald (28)Garnet (20)Iolite (1)Jade (12)Lapis Lazuli (1)Moonstone (8)Morganite (2)Opal (16)Pearl (44)Peridot (8)Rose Quartz (3)Ruby (58)Sapphire (51)Spinel (15)Sunstone (6)Tanzanite (12)Topaz (14)Tourmaline (32)Turquoise (6)Zircon (4)

GIA 任命 Sriram Natarajan为全球鉴定所高级运营副总裁

February 2, 2026

曾任 GIA 印度鉴定所（GIA India）董事总经理的 Sriram 'Ram' Natarajan被任命新职

安娜‧马丁（Anna Martin）荣休告别GIA

February 2, 2026

安娜‧马丁（Anna Martin）荣休告别GIA

GIA检测34.59克拉化学气相沉积法（CVD）实验室培育钻石

February 2, 2026

GIA 玉石报告的推广优惠

February 2, 2026

由 2 月 12 日至 3 月 31 日期间，GIA推出玉石报告推广优惠。

奖学金

February 2, 2026

在每年两次的申请期内，美国宝石研究院 (GIA) 为宝石学、珠宝和设计项目、课程及实习班提供奖学金。请在提供奖学金期间在此提交申请。

提交宝石

February 2, 2026

无论您身在何处，您都可直接向 GIA 各鉴定所提交钻石、有色宝石、珍珠进行检测，我们会确保向您提供始终如一的服务和质量。

研究宝石学家 (Graduate Gemologist®) 课程

February 2, 2026

GIA 是一家非营利私立高等教育机构，致力于推动宝石学教育和研究、珠宝制造艺术以及相关学科的发展。

珍珠文凭 (Graduate Pearls) 课程

February 2, 2026

珍珠文凭 (Graduate Pearls) 课程

2025香港贸发局香港贸发局香港国际钻石、宝石及珍珠展及香港国际珠宝展

February 2, 2026

2025 HKTDC

香港就業資訊

February 2, 2026

查看香港宝石和珠宝行业的近期工作职位……

申请方式

February 2, 2026

GIA 全年开设课程。没有申请截止日期，学生基于先到先得的原则注册。班级人数有限，因此请尽早申请。

GIA协助寻回科罗拉多州被盗钻石

February 2, 2026

GIA美国宝石研究院协助寻回于2023年6月在科罗拉多州一个住宅内连同几件珠宝被偷去的两颗钻石，各重超过4克拉。

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