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Marquise|Natural|GIA

1.50ct H SI1 Marquise Natural Diamond

EX • H/SI1 • GIA 2566506606

Certificate GIA 2566506606

Diamond specifications and retailer prices

From $11,644 SGD
As of November 2, 2026
Save $9,227 SGD (44%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $20,872 SGD at With Clarity · As of November 2, 2026
View at With Clarity

About this 1.5ct natural marquise diamond

This 1.5ct natural marquise sits in the one-and-a-half to two carat band, graded H 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 2566506606. Listed at 14 retailers as of November 2, 2026, with prices from $11,644 to $20,872, a $9,227 spread on the same certified stone. With Clarity lists it at $20,872. 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

1.50
Carat
H
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.79°
Pavilion angle40.2°
OriginNatural
Grading LabGIA
CertificateGIA 2566506606
Dimensions11.36 × 5.97 × 3.79 mm
L/W Ratio1.90
Culet sizeNone
Top View
11.36 mm5.97 mm1.50 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2566506606
Side View
Table 57.0%Crown 36.79°Girdle: MED-THKPavilion 40.2°Culet: NDepth 63.5%

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: $12,998 SGD|Low: $11,644 SGD|High: $20,872 SGD|Avg: $14,557 SGD|-1.9%
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
With Clarity
November 3, 2026
Retailer 2$11,644 SGD
Retailer 12$12,224 SGD
Retailer 8$12,488 SGD
Retailer 3$12,542 SGD
Retailer 4$12,640 SGD
Retailer 11$12,873 SGD
Retailer 1$12,998 SGD
Retailer 5$14,854 SGD
Retailer 6$14,879 SGD
Retailer 10$14,998 SGD
Retailer 9$15,276 SGD
Retailer 7$17,167 SGD
Retailer 13$18,302 SGD
With Clarity$20,872 SGD

24 data points across 14 retailers

14 retailers$11,644 SGD to $20,872 SGD

B+
Cheapest Retailer
-
$11,644 SGD
B+
Retailer 2
-
$12,224 SGD
$9,558 USD
View
B+
Retailer 3
-
$12,488 SGD
$9,765 USD
View
B+
Retailer 4
-
$12,542 SGD
$9,807 USD
View
B+
Retailer 5
-
$12,640 SGD
$9,883 USD
View
Retailer 6
-
$12,873 SGD
$10,066 USD
View
Price last confirmed 10 days ago
B+
Retailer 7
-
$12,998 SGD
£8,003 GBP
View
B
Retailer 8
-
$14,854 SGD
$11,615 USD
View
B
Retailer 9
-
$14,879 SGD
€11,080 EUR
View
B
Retailer 10
-
$14,998 SGD
$11,727 USD
View
Retailer 11
-
$15,276 SGD
$11,945 USD
View
Price last confirmed 12 days ago
B
Retailer 12
-
$17,167 SGD
$13,423 USD
View
B
Retailer 13
-
$18,302 SGD
$14,311 USD
View
Most Expensive
B
With Clarity
2566506606 · Nov 2
$20,872 SGD
$16,320 USD
View
13 more retailers have this diamond
Prices start from $11,644 SGDSave up to $9,227 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+
1.50ct Marquise
$11,644 SGD