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1.51ct D SI2 Round Natural Diamond

VG • D/SI2 • GIA 6312930159

Shape and cutting style on the report: Round brilliant

Certificate GIA 6312930159

Diamond specifications and retailer prices

From $14,292 NZD
$8,055 USD
As of October 25, 2026
Save $16,315 NZD (53%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $30,607 NZD at Diamond Quarter · As of October 31, 2026
View at Diamond Quarter

About this 1.51ct natural round diamond

This 1.51ct natural round sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI2 clarity (slightly-included), with a very-good cut grade and certified by GIA 6312930159. Listed at 15 retailers as of October 25, 2026, with prices from $14,292 to $30,607, a $16,315 spread on the same certified stone. Diamond Quarter lists it at $30,607. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.51
Carat
D
Colour
SI2
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle37.5°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 6312930159
Dimensions7.25 × 7.13 × 4.54 mm
L/W Ratio1.02
Star length50%
Lower girdle80%
Top View
7.25 mm7.13 mm1.51 ctD / SI2
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6312930159
Side View
Table 58.0%Crown 37.5°Girdle: STK-THKPavilion 40.6°Culet: NoneDepth 63.7%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 25
Current: $20,050 NZD|Low: $14,115 NZD|High: $20,050 NZD|Avg: $17,161 NZD|+4.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 31, 2026
Retailer 9$14,115 NZD
Retailer 5$14,292 NZD
Retailer 7$14,869 NZD
Retailer 3$16,463 NZD
Retailer 8$16,843 NZD
Retailer 6$17,212 NZD
Retailer 4$17,618 NZD
Retailer 2$18,896 NZD
Retailer 11$18,896 NZD
Retailer 10$19,535 NZD
Retailer 1$20,050 NZD

38 data points across 11 retailers

15 retailers$14,292 NZD to $30,607 NZD

B+
Cheapest Retailer
-
$14,292 NZD
$8,055 USD
B+
Retailer 2
-
$14,869 NZD
$8,380 USD
View
B+
Retailer 3
-
$15,160 NZD
$8,544 USD
View
B+
Retailer 4
-
$15,248 NZD
$8,594 USD
View
B+
Retailer 5
-
$16,107 NZD
CA$12,608 CAD
View
B+
Retailer 6
-
$16,463 NZD
$9,279 USD
View
B+
Retailer 7
-
$16,843 NZD
$9,493 USD
View
B+
Retailer 8
-
$17,212 NZD
SGD 13,109 SGD
View
B+
Retailer 9
-
$17,618 NZD
£7,818 GBP
View
B
Retailer 10
-
$18,896 NZD
$10,650 USD
View
B
Retailer 11
-
$18,896 NZD
$10,650 USD
View
B
Retailer 12
-
$19,308 NZD
$10,882 USD
View
B
Retailer 13
-
$19,535 NZD
$11,010 USD
View
B
Retailer 14
-
$20,050 NZD
€10,762 EUR
View
Most Expensive
B
Diamond Quarter
1.51SI2D6359E8AAN · Oct 31
$30,607 NZD
£13,583 GBP
View
14 more retailers have this diamond
Prices start from $14,292 NZDSave up to $16,315 NZD

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

B+
1.51ct Round
$14,292 NZD