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Marquise|Natural|GIA

1.02ct J SI1 Marquise Natural Diamond

EX • J/SI1 • GIA 7431670394

Certificate GIA 7431670394

Diamond specifications and retailer prices

From £1,535 GBP
As of November 1, 2026
Save £1,357 GBP (47%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £2,892 GBP at MOH London · As of November 4, 2026
View at MOH London

About this 1.02ct natural marquise diamond

This 1.02ct natural marquise sits in the classic one-carat band, graded J 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 7431670394. Listed at 7 retailers as of November 1, 2026, with prices from £1,535 to £2,892, a £1,357 spread on the same certified stone. MOH London lists it at £2,892. 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

1.02
Carat
J
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 7431670394
Dimensions9.81 × 5.33 × 3.34 mm
L/W Ratio1.84
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Cloud, Knot, Cavity, Needle, Natural
Top View
9.81 mm5.33 mm1.02 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 7431670394
Side View
Table 59.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 62.6%

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: £2,892 GBP|Low: £1,535 GBP|High: £3,059 GBP|Avg: £2,017 GBP|-5.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 5, 2026
Retailer 5£1,535 GBP
Retailer 4£1,570 GBP
Retailer 2£1,798 GBP
Retailer 6£1,934 GBP
Retailer 3£2,058 GBP
Retailer 7£2,123 GBP
MOH London£2,892 GBP

30 data points across 7 retailers

7 retailers£1,535 GBP to £2,892 GBP

B+
Cheapest Retailer
-
£1,535 GBP
B+
Retailer 2
-
£1,570 GBP
View
B+
Retailer 3
-
£1,798 GBP
View
B
Retailer 4
-
£1,934 GBP
View
B
Retailer 5
-
£2,058 GBP
View
Retailer 6
-
£2,123 GBP
View
Price last confirmed 31 days ago
Most Expensive
B
MOH London
7C57422B3 · Nov 4
£2,892 GBP
View
6 more retailers have this diamond
Prices start from £1,535 GBPSave up to £1,357 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+
1.02ct Marquise
£1,535 GBP