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Marquise|Natural|GIA

1.51ct F SI1 Marquise Natural Diamond

ID • F/SI1 • GIA 6555004556

Certificate GIA 6555004556

Diamond specifications and retailer prices

From $11,359 SGD
$8,882 USD
As of November 2, 2026
Save $6,947 SGD (38%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $18,306 SGD at NZ Jewellers · As of November 3, 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 F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6555004556. Listed at 9 retailers as of November 2, 2026, with prices from $11,359 to $18,306, a $6,947 spread on the same certified stone. NZ Jewellers lists it at $18,306. 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
F
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceFaint
Crown angle37.35°
Pavilion angle41.16°
OriginNatural
Grading LabGIA
CertificateGIA 6555004556
Dimensions11.20 × 5.96 × 3.80 mm
L/W Ratio1.88
Top View
11.20 mm5.96 mm1.51 ctF / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6555004556
Side View
Table 61.0%Crown 37.35°Girdle: ThickPavilion 41.16°Culet: NoneDepth 63.8%

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 2
Current: $18,306 SGD|Low: $11,359 SGD|High: $18,306 SGD|Avg: $13,903 SGD
NZ Jewellers
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 2, 2026
Retailer 9$11,359 SGD
Retailer 10$12,009 SGD
Retailer 7$12,062 SGD
Retailer 2$12,288 SGD
Retailer 13$12,827 SGD
Retailer 12$13,134 SGD
Retailer 11$13,142 SGD
Retailer 8$13,336 SGD
Retailer 3$13,515 SGD
Retailer 5$15,376 SGD
Retailer 4$15,463 SGD
Retailer 6$17,153 SGD
NZ Jewellers$18,306 SGD

21 data points across 13 retailers

9 retailers$11,359 SGD to $18,306 SGD

B+
Cheapest Retailer
-
$11,359 SGD
$8,882 USD
B+
Retailer 2
-
$12,009 SGD
$9,390 USD
View
Retailer 3
-
$12,062 SGD
A$14,510 AUD
View
Price last confirmed 10 days ago
B+
Retailer 4
-
$12,288 SGD
£7,566 GBP
View
B+
Retailer 5
-
$13,134 SGD
$10,270 USD
View
B+
Retailer 6
-
$13,142 SGD
$10,276 USD
View
B+
Retailer 7
-
$13,336 SGD
$10,428 USD
View
B
Retailer 8
-
$17,153 SGD
£10,561 GBP
View
Most Expensive
B
NZ Jewellers
45b6177d-5acf-4cbc-812e-31be09da4409 · Nov 3
$18,306 SGD
$14,314 USD
View
8 more retailers have this diamond
Prices start from $11,359 SGDSave up to $6,947 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 Marquise
$11,359 SGD