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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 $11,467 AUD
$8,055 USD
As of October 25, 2026
Save $13,090 AUD (53%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $24,557 AUD 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 $11,467 to $24,557, a $13,090 spread on the same certified stone. Diamond Quarter lists it at $24,557. 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: $14,136 AUD|Low: $11,325 AUD|High: $16,087 AUD|Avg: $13,769 AUD|-0.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 1, 2026
Retailer 9$11,325 AUD
Retailer 5$11,467 AUD
Retailer 7$11,930 AUD
Retailer 3$13,209 AUD
Retailer 8$13,514 AUD
Retailer 6$13,810 AUD
Retailer 1$14,136 AUD
Retailer 2$15,161 AUD
Retailer 11$15,161 AUD
Retailer 10$15,674 AUD
Retailer 4$16,087 AUD

39 data points across 11 retailers

15 retailers$11,467 AUD to $24,557 AUD

B+
Cheapest Retailer
-
$11,467 AUD
$8,055 USD
B+
Retailer 2
-
$11,930 AUD
$8,380 USD
View
B+
Retailer 3
-
$12,163 AUD
$8,544 USD
View
B+
Retailer 4
-
$12,234 AUD
$8,594 USD
View
B+
Retailer 5
-
$12,924 AUD
CA$12,608 CAD
View
B+
Retailer 6
-
$13,209 AUD
$9,279 USD
View
B+
Retailer 7
-
$13,514 AUD
$9,493 USD
View
B+
Retailer 8
-
$13,810 AUD
SGD 13,109 SGD
View
B+
Retailer 9
-
$14,136 AUD
£7,819 GBP
View
B
Retailer 10
-
$15,161 AUD
$10,650 USD
View
B
Retailer 11
-
$15,161 AUD
$10,650 USD
View
B
Retailer 12
-
$15,492 AUD
$10,882 USD
View
B
Retailer 13
-
$15,674 AUD
$11,010 USD
View
B
Retailer 14
-
$16,087 AUD
€10,762 EUR
View
Most Expensive
B
Diamond Quarter
1.51SI2D6359E8AAN · Oct 31
$24,557 AUD
£13,583 GBP
View
14 more retailers have this diamond
Prices start from $11,467 AUDSave up to $13,090 AUD

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
$11,467 AUD