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Marquise|Natural|GIA

1.51ct G SI1 Marquise Natural Diamond

EX • G/SI1 • GIA 6555666190

Certificate GIA 6555666190

Diamond specifications and retailer prices

From $10,493 SGD
$8,205 USD
As of November 1, 2026
Save $3,958 SGD (27%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $14,452 SGD at Jared · As of November 2, 2026
View at Jared

About this 1.51ct natural marquise diamond

This 1.51ct natural marquise sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6555666190. Listed at 9 retailers as of November 1, 2026, with prices from $10,493 to $14,452, a $3,958 spread on the same certified stone. Jared lists it at $14,452. 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
G
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6555666190
Dimensions11.41 × 5.94 × 3.77 mm
L/W Ratio1.92
Culet sizeNone
Key to symbols
Cloud, Crystal, Feather, Cavity, Needle
Top View
11.41 mm5.94 mm1.51 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6555666190
Side View
Table 60.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 63.4%

Caratlytics Score

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

Price History

Last verified: Nov 1
Current: $14,452 SGD|Low: $10,922 SGD|High: $15,129 SGD|Avg: $13,174 SGD|-4.5%
Jared
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 2, 2026
Retailer 4$11,603 SGD
Retailer 5$11,767 SGD
Retailer 2$12,395 SGD
Retailer 6$12,467 SGD
Retailer 8$13,220 SGD
Retailer 3$13,978 SGD
Retailer 7$13,978 SGD
Jared$14,452 SGD

16 data points across 8 retailers

9 retailers$10,493 SGD to $14,452 SGD

A
Cheapest Retailer
-
$10,493 SGD
$8,205 USD
B+
Retailer 2
-
$11,603 SGD
View
B+
Retailer 3
-
$11,767 SGD
$9,201 USD
View
Final sale: no returns
B+
Retailer 4
-
$12,395 SGD
£7,631 GBP
View
B+
Retailer 5
-
$12,467 SGD
$9,748 USD
View
B+
Retailer 6
-
$13,220 SGD
$10,337 USD
View
B
Retailer 7
-
$13,978 SGD
$10,930 USD
View
B
Retailer 8
-
$13,978 SGD
$10,930 USD
View
Most Expensive
B
Jared
159480438 · Nov 2
$14,452 SGD
$11,300 USD
View
8 more retailers have this diamond
Prices start from $10,493 SGDSave up to $3,958 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
$10,493 SGD