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Marquise|Natural|GIA

1.50ct G SI1 Marquise Natural Diamond

EX • G/SI1 • GIA 2564368871

Certificate GIA 2564368871

Diamond specifications and retailer prices

From £7,064 GBP
SGD 12,810 SGD
As of November 1, 2026
Save £5,598 GBP (44%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £12,662 GBP 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 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 2564368871. Listed at 16 retailers as of November 1, 2026, with prices from £7,064 to £12,662, a £5,598 spread on the same certified stone. With Clarity lists it at £12,662. 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
G
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle39.9°
Pavilion angle39.78°
OriginNatural
Grading LabGIA
CertificateGIA 2564368871
Dimensions11.76 × 5.65 × 3.59 mm
L/W Ratio2.08
Culet sizeNone
Top View
11.76 mm5.65 mm1.50 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2564368871
Side View
Table 58.0%Crown 39.9°Girdle: STK-VTKPavilion 39.78°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 1
Current: £9,026 GBP|Low: £7,064 GBP|High: £12,662 GBP|Avg: £8,704 GBP|+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
Retailer 14
Retailer 15
With Clarity
November 2, 2026
Retailer 6£7,064 GBP
Retailer 2£7,415 GBP
Retailer 10£7,556 GBP
Retailer 7£7,610 GBP
Retailer 11£7,647 GBP
Retailer 15£7,668 GBP
Retailer 14£7,810 GBP
Retailer 4£7,817 GBP
Retailer 8£7,818 GBP
Retailer 5£8,997 GBP
Retailer 1£9,026 GBP
Retailer 13£9,084 GBP
Retailer 12£9,275 GBP
Retailer 9£10,414 GBP
Retailer 3£11,105 GBP
With Clarity£12,662 GBP

29 data points across 16 retailers

16 retailers£7,064 GBP to £12,662 GBP

B+
Cheapest Retailer
-
£7,064 GBP
SGD 12,810 SGD
B+
Retailer 2
-
£7,415 GBP
$9,950 USD
View
B+
Retailer 3
-
£7,556 GBP
$10,140 USD
View
B+
Retailer 4
-
£7,610 GBP
$10,212 USD
View
B+
Retailer 5
-
£7,647 GBP
SGD 13,868 SGD
View
B+
Retailer 6
-
£7,668 GBP
$10,290 USD
View
B+
Retailer 7
-
£7,810 GBP
$10,480 USD
View
B+
Retailer 8
-
£7,817 GBP
$10,490 USD
View
B+
Retailer 9
-
£7,818 GBP
View
B
Retailer 10
-
£8,997 GBP
$12,074 USD
View
B
Retailer 11
-
£9,026 GBP
€11,535 EUR
View
B
Retailer 12
-
£9,084 GBP
$12,190 USD
View
B
Retailer 13
-
£9,275 GBP
$12,447 USD
View
B
Retailer 14
-
£10,414 GBP
$13,975 USD
View
B
Retailer 15
-
£11,105 GBP
$14,902 USD
View
Most Expensive
B
With Clarity
2564368871 · Nov 1
£12,662 GBP
$16,991 USD
View
15 more retailers have this diamond
Prices start from £7,064 GBPSave up to £5,598 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
£7,064 GBP