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Marquise|Natural|GIA

1.20ct F SI1 Marquise Natural Diamond

EX • F/SI1 • GIA 2566588407

Certificate GIA 2566588407

Diamond specifications and retailer prices

From £3,758 GBP
As of November 5, 2026
Save £2,948 GBP (44%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £6,706 GBP at Wholesale Diamonds Direct · As of November 6, 2026
View at Wholesale Diamonds Direct

About this 1.2ct natural marquise diamond

This 1.2ct natural marquise sits in the classic one-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 2566588407. Listed at 15 retailers as of November 5, 2026, with prices from £3,758 to £6,706, a £2,948 spread on the same certified stone. Wholesale Diamonds Direct lists it at £6,706. 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

1.20
Carat
F
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle39.73°
Pavilion angle39.25°
OriginNatural
Grading LabGIA
CertificateGIA 2566588407
Dimensions10.89 × 5.44 × 3.36 mm
L/W Ratio2.00
Culet sizeNone
Top View
10.89 mm5.44 mm1.20 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2566588407
Side View
Table 57.0%Crown 39.73°Girdle: MED-THKPavilion 39.25°Culet: NDepth 61.7%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: £5,239 GBP|Low: £3,758 GBP|High: £6,706 GBP|Avg: £4,776 GBP
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
Wholesale Diamonds Direct
November 6, 2026
Retailer 9£3,758 GBP
Retailer 13£3,799 GBP
Retailer 4£3,910 GBP
Retailer 2£3,986 GBP
Retailer 12£4,001 GBP
Retailer 8£4,122 GBP
Retailer 7£4,222 GBP
Retailer 6£4,687 GBP
Retailer 5£4,693 GBP
Retailer 11£4,708 GBP
Retailer 1£5,239 GBP
Retailer 10£6,370 GBP
Retailer 3£6,516 GBP
Wholesale Diamonds Direct£6,706 GBP

22 data points across 14 retailers

15 retailers£3,758 GBP to £6,706 GBP

B+
Cheapest Retailer
-
£3,758 GBP
B+
Retailer 2
-
£3,799 GBP
View
Retailer 3
-
£3,847 GBP
View
Price last confirmed 11 days ago
B+
Retailer 4
-
£3,910 GBP
View
B+
Retailer 5
-
£3,986 GBP
View
B+
Retailer 6
-
£4,001 GBP
View
B
Retailer 7
-
£4,122 GBP
View
B+
Retailer 8
-
£4,222 GBP
View
B
Retailer 9
-
£4,687 GBP
View
B
Retailer 10
-
£4,693 GBP
View
B
Retailer 11
-
£4,708 GBP
View
B
Retailer 12
-
£5,239 GBP
View
B
Retailer 13
-
£6,370 GBP
View
B
Retailer 14
-
£6,516 GBP
View
Most Expensive
B
Wholesale Diamonds Direct
661914535 · Nov 6
£6,706 GBP
$8,976 USD
View
14 more retailers have this diamond
Prices start from £3,758 GBPSave up to £2,948 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+
1.20ct Marquise
£3,758 GBP