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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 $12,992 AUD
SGD 12,304 SGD
As of November 2, 2026
Save $10,295 AUD (44%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $23,287 AUD at With Clarity · As of November 1, 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 1, 2026, with prices from $12,992 to $23,287, a $10,295 spread on the same certified stone. With Clarity lists it at $23,287. 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: $16,601 AUD|Low: $12,992 AUD|High: $23,287 AUD|Avg: $16,241 AUD|+0.4%
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 2, 2026
Retailer 2$12,992 AUD
Retailer 12$13,638 AUD
Retailer 8$13,934 AUD
Retailer 3$13,994 AUD
Retailer 4$14,102 AUD
Retailer 11$14,363 AUD
Retailer 6$14,382 AUD
Retailer 5$16,573 AUD
Retailer 1$16,601 AUD
Retailer 10$16,733 AUD
Retailer 9$17,044 AUD
Retailer 7$19,153 AUD
Retailer 13$20,420 AUD
With Clarity$23,287 AUD

23 data points across 14 retailers

14 retailers$12,992 AUD to $23,287 AUD

B+
Cheapest Retailer
-
$12,992 AUD
SGD 12,304 SGD
B+
Retailer 2
-
$13,638 AUD
$9,558 USD
View
B+
Retailer 3
-
$13,934 AUD
$9,765 USD
View
B+
Retailer 4
-
$13,994 AUD
$9,807 USD
View
B+
Retailer 5
-
$14,102 AUD
$9,883 USD
View
Retailer 6
-
$14,363 AUD
$10,066 USD
View
Price last confirmed 10 days ago
B+
Retailer 7
-
$14,382 AUD
£7,936 GBP
View
B
Retailer 8
-
$16,573 AUD
$11,615 USD
View
B
Retailer 9
-
$16,601 AUD
€11,080 EUR
View
B
Retailer 10
-
$16,733 AUD
$11,727 USD
View
Retailer 11
-
$17,044 AUD
$11,945 USD
View
Price last confirmed 11 days ago
B
Retailer 12
-
$19,153 AUD
$13,423 USD
View
B
Retailer 13
-
$20,420 AUD
$14,311 USD
View
Most Expensive
B
With Clarity
2566506606 · Nov 1
$23,287 AUD
$16,320 USD
View
13 more retailers have this diamond
Prices start from $12,992 AUDSave up to $10,295 AUD

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
$12,992 AUD