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Marquise|Natural|GIA

1.51ct K SI2 Marquise Natural Diamond

VG • K/SI2 • GIA 2556257527

Certificate GIA 2556257527

Diamond specifications and retailer prices

From $5,129 SGD
As of November 5, 2026
Save $6,043 SGD (54%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $11,946 SGD at NZ Jewellers · As of September 25, 2026
View at NZ Jewellers

About this 1.51ct natural marquise diamond

This 1.51ct natural marquise sits in the one-and-a-half to two carat band, graded K colour (faint-tinted) and SI2 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 2556257527. Listed at 14 retailers as of November 4, 2026, with a 118% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
K
Colour
SI2
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2556257527
Dimensions10.91 × 5.89 × 3.88 mm
L/W Ratio1.85
Girdle conditionFaceted
Top View
10.91 mm5.89 mm1.51 ctK / SI2
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2556257527
Side View
Table 57.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 65.9%

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 5
Current: $10,396 SGD|Low: $5,129 SGD|High: $11,511 SGD|Avg: $6,945 SGD|-3.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 6, 2026
Retailer 3$5,129 SGD
Retailer 7$5,151 SGD
Retailer 12$5,566 SGD
Retailer 4$5,697 SGD
Retailer 10$5,785 SGD
Retailer 2$5,881 SGD
Retailer 6$6,152 SGD
Retailer 13$6,272 SGD
Retailer 8$6,636 SGD
Retailer 5$6,771 SGD
Retailer 11$7,823 SGD
Retailer 1$10,396 SGD
Retailer 9$11,172 SGD

27 data points across 13 retailers

14 retailers$5,129 SGD to $11,172 SGD

A
Cheapest Retailer
-
$5,129 SGD
A
Retailer 2
-
$5,151 SGD
View
A
Retailer 3
-
$5,566 SGD
View
B+
Retailer 4
-
$5,697 SGD
View
A
Retailer 5
-
$5,785 SGD
View
B+
Retailer 6
-
$5,881 SGD
View
Final sale: no returns
B+
Retailer 7
-
$6,152 SGD
View
B+
Retailer 8
-
$6,272 SGD
View
B+
Retailer 9
-
$6,636 SGD
View
B+
Retailer 10
-
$6,771 SGD
View
B+
Retailer 11
-
$7,823 SGD
View
B
Retailer 12
-
$10,396 SGD
View
B
Retailer 13
-
$11,172 SGD
View
Most Expensive
NZ Jewellers
8d27364e-0cc6-4b8a-ac56-fb8dae0ef48c · Sep 25
$11,946 SGD
$9,321 USD
View
Price last confirmed 42 days ago
13 more retailers have this diamond
Prices start from $5,129 SGDSave up to $6,043 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 Marquise
$5,129 SGD