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Round|Natural|GIA

1.51ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 2231916633

Certificate GIA 2231916633

Diamond specifications and retailer prices

From $3,395 SGD
As of November 6, 2026
Save $4,347 SGD (56%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $8,283 SGD at NZ Jewellers · As of October 14, 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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2231916633. Listed at 9 retailers as of November 4, 2026, with a 128% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 2231916633
Dimensions7.35 × 7.39 × 4.47 mm
L/W Ratio1.01
Key to symbols
Crystal, Cloud, Feather, Needle
Top View
7.35 mm7.39 mm1.51 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2231916633
Side View
Table 58.0%CrownGirdle: MED-STKPavilion 40.6°Culet: NoneDepth 60.6%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $3,395 SGD|Low: $3,395 SGD|High: $8,141 SGD|Avg: $4,994 SGD|-3.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 1$3,395 SGD
Retailer 7$3,973 SGD
Retailer 6$4,137 SGD
Retailer 3$4,710 SGD
Retailer 2$4,993 SGD
Retailer 5$5,388 SGD
Retailer 4$7,742 SGD

33 data points across 7 retailers

9 retailers$3,395 SGD to $7,742 SGD

A
Cheapest Retailer
-
$3,395 SGD
A
Retailer 2
-
$4,137 SGD
View
A
Retailer 3
-
$4,710 SGD
View
Retailer 4
-
$4,753 SGD
View
Price last confirmed 23 days ago
Retailer 5
-
$4,937 SGD
View
Price last confirmed 22 days ago
A
Retailer 6
-
$4,993 SGD
View
B+
Retailer 7
-
$5,388 SGD
View
B
Retailer 8
-
$7,742 SGD
View
Most Expensive
NZ Jewellers
0cde3ada-7edd-4044-afbe-0eaec8da3c89 · Oct 14
$8,283 SGD
$6,463 USD
View
Price last confirmed 23 days ago
8 more retailers have this diamond
Prices start from $3,395 SGDSave up to $4,347 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.

A
1.51ct Round
$3,395 SGD