天然钻石协会：2025巨型天然钻石研究报告：成因、历史、产地、市场及价值（英文版）（38页）.pdf

1、1Diamond ReportsA SERIES OF REPORTS UNCOVERING THE TRENDS,ORIGINS AND UNIQUE IMPACTS OF THE ULTIMATE NATURAL GEMSTONE.RECORD-BREAKINGDIAMONDS|DIAMOND REPORTS:Record-Breaking Diamonds QUICK FACTSDISCOVERED IN 1905 IN SOUTH AFRICAOnly a handful in history have exceeded 1,000 carats,and each discovery

2、has reshaped what we know about diamond formation,mining and craftsmanship.3,106 caratsLarge diamonds are geological outliers extreme rarities formed deep within the Earth.The Cullinan Diamondis the largest gem-quality rough diamond ever found.IMAGE:Cullinan Diamond,roughCREDIT:Royal AsscherIMAGE:Mo

3、tswedi diamond,roughCREDIT:Lucara DiamondTHE KOH-I-NOOR DIAMOND originated in Indias Golconda region is seen as the first truly monumental diamond on record.3ADVANCED X-ray technology NOW ENABLES EXCEPTIONALLY LARGE DIAMONDS TO BE IDENTIFIED EARLY,ENSURING THEY REMAIN INTACT.THE WORLDS LARGEST DIAMO

4、NDSFORM FAR DEEPER THAN MOST OTHERSUp to 750kmBELOW THE EARTHS SURFACE.THEY ARE ALMOST ALWAYS TYPE IIA,CHEMICALLY PURE AND NITROGENFREE.SURFACE.but why that is remains a mystery.Karowe,Leteng and Cullinan mines dominate the large diamond discoveriesThe CTFPink Star59.60 caratsSOLD AT AUCTION FOR$71.

5、2 MILLION,making it the most expensive diamond to go under the hammer.The ConstellationMOST EXPENSIVE ROUGH EVER SOLD:$63.1MILLIONfor an 813-carat diamond.The Hope Diamond is displayed at the worlds largest museum,the Smithsonian Institution in Washington DC,where it has captivated more than 100 MIL

6、LION VISITORS,making it one of the most viewed diamonds in history.IMAGE:The largest polished diamond from the Lesotho Legend:a 79.35-carat oval.CREDIT:Ilan Tach Photography,photograhed for Groupe Tach and DiamcadIMAGE:Motswedi diamond,roughCREDIT:Lucara D|DIAMOND REPORTS:Record-Breaking Diamonds Ta