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67 Cards in this Set
- Front
- Back
CSO
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CENTRAL SELLING ORGANIZATION FORMED BY DE BEERS
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KIMBERLITE LAYERS
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YELLOW GROUND=10-30M
BLUE GROUND=30-500M HARD(GREY) GROUND=500M+ DEEP |
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MAJOR DIAMOMOND PRODUCTION
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AFRICA-CONTINENET
AUSTRAILIA-LG. MINE ARGYLE RUSSIA-LG. RESERVE |
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ALLUVIAL ROCKS
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WASHED BY EONS OF STORMS AND ARE FOUND ON THE SURFACE
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A MELANGE
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RANDOM GROUPING OF STONES-SIMILAR IN SIZE AND CUT
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KIMBERLITE
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PIPES OF DIAMOND BEARING DEPOSITS
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GRADEMAKER
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INCLUSION THAT SETS THE GRADE NO MATTER WHAT OTHER PROBLEMS
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GIRDLE
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EDGE OF A FACETED STONE
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ROUND BRILLIANT
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57-58 FACETS-Prongs set on upper mains
Crown==32-33w/ table 8 Bezel 8 Star or Upper mains 16 Girdle Pavilion==24-25 w/ culet 8 Mains 16 Lower girdle |
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# FACETS AND NAMES ON A BRILLIANT DIAMOND
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CROWN
8 BEZEL OR UPPER MAIN FACETS 8 STAR FACETS 16 UPPER-GIRDLE FACETS +TABLE PAVILION 8 PAVILION OR MAIN FACETS 16 LOWER GIRDLE FACETS +CULET |
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DIAMOND SIMULANTS
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1. MOISONITE
2. CUBIC ZIRCONIA 3. GGG garnet, gallium, gadolinium |
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DTC
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DIAMOND TRADING COMPANY REPLACED DE BEERS
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DTC
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DIAMOND TRADING COMPANY
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PAVILION DEPTH-GIA
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EXCELLENT=43%
VG/G=42-44% AVERAGE=41-46% BELOW AV.=<41->46% |
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TYPES OF DIAMOND CUTS
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-ASSCHER'S TRILLIANT&CONTTEMP
-EMERALD TRADITIONAL AND SQU -STARBURST -SQUARE CUTS=PRINCESS, BARION, RADIANT, QUADRILLION -BAGUETTE=LONG RECT -TAPERED BAGUETTE |
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MEASUREMENT OF PROPORTIONS
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ALL PROPORTIONS AS A % OF THE GIRDLE
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ROUND CUTS (D)
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MODERN BRILLIANT
SINGLE CUT SWISS CUT |
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BRUTING
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ROUNDING OUT A ROUGH STONE
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EARLY CUTS
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OEC-OLD EUROPEAN CUT
OLD MINE CUT |
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NORMAL COLOR RANGE
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YELLOWISH-->BROWNISH-->GRAYISH
ALL OTHER COLORS ARE FANCY |
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OTHER BRILLIANT CUTS
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OVAL
HEART MARQUISE PEAR |
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HOPE DIAMOND
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BIGGEST DARK BLUE DIAMOND S/ CURSE AND IS IN THE SMITHSONIAN
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DIAMOND STATS
CRYSTAL-ISOMETRIC (CUBIC) CLEAVAGE-4 WAY PEFECT BREAK/FRACTURE-STEP LIKE RI-2.417 SG-3.52 DISPERSION-.044 |
+
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BOW-TIE
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CAUSED BY 2 VARIATION IN LIGHT ANGLES
LOOKING THROUGH THE TABLE AT THE CULET--REFLECTION OF THE STAR FACETS IN THE PAVILION |
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CRITICAL ANGLE (D)
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24 DEGREES 26 MINUTES
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ADAMAS
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INVINCIBLE
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FANCY CUTS
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MARIGOLD-73 FACETS
DAHLIA-12 SIDED OVAL ZINNIA SUNFLOWER FIREROSE MARQUISE DREAM CUT==MORE TABLES PEAR DREAM CUT OVAL DREAM CUT |
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DIAMOND CUTTING CENTERS
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ANTWERP
TEL AVIV-RAMATGAN INDIA USA |
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YAHUDA
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PATENTED FRACTURE FILLED MANUFACTURER
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PHANTOM
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EVIDENCE OF THE GROWTH PATTERN IN A SYNTHETIC DIAMOND OR GEM
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CLEAVAGE
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4-WAY PERFECT CLEAVAGE
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1ST AFRICAN DIAMOND
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CALLED "EUREKA" AND CUT INTO 10.73CT.
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DIAMOND CERTIFICATIONS
CALLED-PLOT DIAMONDS |
GREEN-BLEMISHES
RED-INCLUSIONS BLACK-PRONGS AND EXTRA FACETS |
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SYNTHETIC DIAMONDS
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CHEAPEST-->FLAME FUSION
MOST EXPENSIVE-->FLUX W/ SEED PLATE AND GROWN |
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DISPERSION
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.044
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BRILLIANT CUT-EULITZ
YR. 1976 |
CROWN HT.>14.45%
GIRDLE THICKNESS>1.50% PAV. DEPTH>43.15% TABLE DIAM.>56.50% |
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TYPES OF DIAMONDS
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1a, 1b, 2a, 2b
1a ~98% 2b CONTAINS BORON FOR BLUE COLOR |
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IDEAL BRILLIANT CUT PROPORTIONS
1926 |
CROWN HT.>19.2%
PAVILLION DEPTH>40.0% TABLE DIAM.>56.1% |
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FISHEYE
NAILHEAD |
39% PAV
49% PAV |
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DIAMOND MUST HAVE AT LEAST 17 POLISHED FACETS
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+
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CROWN
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32 OR 33 W/ TABLE FACETS
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DIAMONDS ARE SORTED INTO 14,000 DIFFERENT CATAGORIES
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+
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LEVERAGE GAUGE
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USED TO MEASURE STONES
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SWINDLE TABLE
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65% OR LARGER
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CULLINAN I
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530.20 CTS.
PLACED IN THE ROYAL SCEPTRE ROUGH--3106 CTS. |
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HTHP
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HIGH TEMP/HIGH PRESSURE
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CHAMPAGNE DIAMONDS
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C1-C7
DARKEST IS COGNAC |
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TABLE
SWINDLE |
55-62 DEGREEES
65+ |
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OEC
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OLD EUROPEAN CUT
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BEARDING
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SMALL FEATHERS FROM EDGE OF GIRDLE INTO THE STONE
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ROUNDING DIAMOND WEGHTS
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ONLY TO .00
INT. 1.009->1.01 1.008->1.00 AMERICAN 1.005->1.01 1.004->1.00 |
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COMMON HABIT (D)
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OCTEHEDRON
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LUSTRE
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REFLECTION OF LIGHT OFF OF THE SURFACE
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BRILLIANCE
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WHITE LIGHT RETURNING FROM THE STONE
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DISPERSION
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SCATTERING OF LIGHT INTO SPECTRAL COLORS
CALLED "FIRE" OR "LIFE" |
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SCINTILLATION
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COMBINATION OF LUSTRE, BRILLIANCE, AND DISPERSION
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CLARITY GRADING
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SIZE
NUMBER COLOR LOCATION TYPE/KIND |
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VALUE OF DIAMOND
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50% COLOR
35% CLARITY 15% CUT + 15% FANCY CUT 15%-30% PANTENTED CUT |
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MELEE (MAY-LAY)
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LESS THAN .200 CTS.
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SWINDLE TABLE
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65 % OR GREATER
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PIQUE(PEE-KAY)
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LOW END OF CLARITY GRADED STONES
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DARK FIELD
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LIGHT USED WITH MICROSCOPE TO DETECT INCLUSIONS
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KEEL LINE
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CULET ON A FANCY CUT STONE
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S.G. DIAMOND
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3.52
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R.I. DIAMOND
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2.417 OR 2.42
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MARQUIS (MARKEES)
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2 POINTED CUT
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PAVILLION
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24 OR 25 W/ CULET FACETS
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