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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 £6,785 GBP
SGD 12,304 SGD
As of November 2, 2026
Save £5,377 GBP (44%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £12,162 GBP 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 £6,785 to £12,162, a £5,377 spread on the same certified stone. With Clarity lists it at £12,162. 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: £7,574 GBP|Low: £6,785 GBP|High: £12,162 GBP|Avg: £8,482 GBP|-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£6,785 GBP
Retailer 12£7,123 GBP
Retailer 8£7,277 GBP
Retailer 3£7,308 GBP
Retailer 4£7,365 GBP
Retailer 11£7,501 GBP
Retailer 1£7,574 GBP
Retailer 5£8,655 GBP
Retailer 6£8,670 GBP
Retailer 10£8,739 GBP
Retailer 9£8,901 GBP
Retailer 7£10,003 GBP
Retailer 13£10,664 GBP
With Clarity£12,162 GBP

24 data points across 14 retailers

14 retailers£6,785 GBP to £12,162 GBP

B+
Cheapest Retailer
-
£6,785 GBP
SGD 12,304 SGD
B+
Retailer 2
-
£7,123 GBP
$9,558 USD
View
B+
Retailer 3
-
£7,277 GBP
$9,765 USD
View
B+
Retailer 4
-
£7,308 GBP
$9,807 USD
View
B+
Retailer 5
-
£7,365 GBP
$9,883 USD
View
Retailer 6
-
£7,501 GBP
$10,066 USD
View
Price last confirmed 10 days ago
B+
Retailer 7
-
£7,574 GBP
View
B
Retailer 8
-
£8,655 GBP
$11,615 USD
View
B
Retailer 9
-
£8,670 GBP
€11,080 EUR
View
B
Retailer 10
-
£8,739 GBP
$11,727 USD
View
Retailer 11
-
£8,901 GBP
$11,945 USD
View
Price last confirmed 12 days ago
B
Retailer 12
-
£10,003 GBP
$13,423 USD
View
B
Retailer 13
-
£10,664 GBP
$14,311 USD
View
Most Expensive
B
With Clarity
2566506606 · Nov 2
£12,162 GBP
$16,320 USD
View
13 more retailers have this diamond
Prices start from £6,785 GBPSave up to £5,377 GBP

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
£6,785 GBP