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1.51ct K SI2 Round Natural Diamond

EX • K/SI2 • GIA 6491766711

Shape and cutting style on the report: Round brilliant

Certificate GIA 6491766711

Diamond specifications and retailer prices

From $5,854 SGD
As of November 4, 2026
Save $6,538 SGD (53%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $12,392 SGD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.51ct natural round diamond

This 1.51ct natural round sits in the one-and-a-half to two carat band, graded K colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6491766711. Listed at 15 retailers as of November 4, 2026, with prices from $5,854 to $12,392, a $6,538 spread on the same certified stone. NZ Jewellers lists it at $12,392. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.51
Carat
K
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 6491766711
Dimensions7.34 × 7.31 × 4.56 mm
L/W Ratio1.00
Star length50%
Lower girdle75%
Top View
7.34 mm7.31 mm1.51 ctK / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6491766711
Side View
Table 56.0%Crown 34.5°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 62.2%

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: Nov 4
Current: $8,053 SGD|Low: $5,854 SGD|High: $11,047 SGD|Avg: $7,527 SGD|-0.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 5, 2026
Retailer 9$5,854 SGD
Retailer 5$5,925 SGD
Retailer 7$5,927 SGD
Retailer 8$6,249 SGD
Retailer 2$6,713 SGD
Retailer 3$7,109 SGD
Retailer 1$8,053 SGD
Retailer 6$8,069 SGD
Retailer 10$9,953 SGD
Retailer 4$10,888 SGD

43 data points across 10 retailers

15 retailers$5,854 SGD to $12,392 SGD

B+
Cheapest Retailer
-
$5,854 SGD
B+
Retailer 2
-
$5,925 SGD
View
B+
Retailer 3
-
$5,927 SGD
View
B+
Retailer 4
-
$6,249 SGD
View
B
Retailer 5
-
$6,642 SGD
View
Retailer 6
-
$6,713 SGD
View
Price last confirmed 8 days ago
B
Retailer 7
-
$6,713 SGD
View
B
Retailer 8
-
$6,713 SGD
View
B+
Retailer 9
-
$7,109 SGD
View
B
Retailer 10
-
$7,746 SGD
View
B
Retailer 11
-
$8,053 SGD
View
B
Retailer 12
-
$8,069 SGD
View
Retailer 13
-
$8,173 SGD
View
Price last confirmed 14 days ago
B
Retailer 14
-
$10,888 SGD
View
Most Expensive
B
NZ Jewellers
2ebd30b8-ea8c-4b5d-85d4-042f8b38b488 · Nov 5
$12,392 SGD
$9,702 USD
View
14 more retailers have this diamond
Prices start from $5,854 SGDSave up to $6,538 SGD

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
$5,854 SGD