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Marquise|Natural|GIA

1.02ct I SI1 Marquise Natural Diamond

EX • I/SI1 • GIA 7558906414

Certificate GIA 7558906414

Diamond specifications and retailer prices

From £1,885 GBP
As of November 3, 2026
Save £1,605 GBP (46%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £3,490 GBP at Helzberg Diamonds · As of November 3, 2026
View at Helzberg Diamonds

About this 1.02ct natural marquise diamond

This 1.02ct natural marquise sits in the classic one-carat band, graded I 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 7558906414. Listed at 15 retailers as of November 3, 2026, with prices from £1,885 to £3,490, a £1,605 spread on the same certified stone. Helzberg Diamonds lists it at £3,490. 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
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.77°
Pavilion angle38.19°
OriginNatural
Grading LabGIA
CertificateGIA 7558906414
Dimensions9.86 × 5.17 × 3.20 mm
L/W Ratio1.91
Culet sizeNone
Top View
9.86 mm5.17 mm1.02 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 7558906414
Side View
Table 59.0%Crown 39.77°Girdle: STK-THKPavilion 38.19°Culet: NDepth 61.9%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 3
Current: £3,490 GBP|Low: £1,885 GBP|High: £3,560 GBP|Avg: £2,434 GBP|-2.0%
Helzberg Diamonds
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
November 5, 2026
Retailer 5£1,885 GBP
Retailer 2£1,918 GBP
Retailer 12£2,015 GBP
Retailer 6£2,037 GBP
Retailer 7£2,072 GBP
Retailer 9£2,170 GBP
Retailer 4£2,209 GBP
Retailer 15£2,375 GBP
Retailer 8£2,398 GBP
Retailer 11£2,446 GBP
Retailer 3£2,454 GBP
Retailer 14£2,546 GBP
Retailer 10£3,095 GBP
Retailer 13£3,290 GBP
Helzberg Diamonds£3,490 GBP

37 data points across 15 retailers

15 retailers£1,885 GBP to £3,490 GBP

A
Cheapest Retailer
-
£1,885 GBP
A
Retailer 2
-
£1,918 GBP
View
B+
Retailer 3
-
£2,015 GBP
View
B+
Retailer 4
-
£2,037 GBP
View
B+
Retailer 5
-
£2,072 GBP
View
B+
Retailer 6
-
£2,170 GBP
View
B+
Retailer 7
-
£2,209 GBP
View
B+
Retailer 8
-
£2,375 GBP
View
B+
Retailer 9
-
£2,398 GBP
View
B+
Retailer 10
-
£2,446 GBP
View
B+
Retailer 11
-
£2,454 GBP
View
B+
Retailer 12
-
£2,546 GBP
View
B
Retailer 13
-
£3,095 GBP
View
B
Retailer 14
-
£3,290 GBP
View
Most Expensive
B
Helzberg Diamonds
XZRNLLOPGMKHK · Nov 3
£3,490 GBP
$4,671 USD
View
14 more retailers have this diamond
Prices start from £1,885 GBPSave up to £1,605 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.

A
1.02ct Marquise
£1,885 GBP