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Marquise|Natural|GIA

1.02ct I SI2 Marquise Natural Diamond

EX • I/SI2 • GIA 3565590413

Certificate GIA 3565590413

Diamond specifications and retailer prices

From £1,849 GBP
$2,481 USD
As of November 1, 2026
Save £1,491 GBP (45%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £3,340 GBP at Helzberg Diamonds · As of November 1, 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 SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 3565590413. Listed at 12 retailers as of November 1, 2026, with prices from £1,849 to £3,340, a £1,491 spread on the same certified stone. Helzberg Diamonds lists it at £3,340. 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
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.6°
Pavilion angle38.17°
OriginNatural
Grading LabGIA
CertificateGIA 3565590413
Dimensions10.96 × 5.24 × 3.04 mm
L/W Ratio2.09
Culet sizeNone
Top View
10.96 mm5.24 mm1.02 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 3565590413
Side View
Table 59.0%Crown 35.6°Girdle: STK-THKPavilion 38.17°Culet: NDepth 58.0%

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 1
Current: £3,340 GBP|Low: £1,849 GBP|High: £3,340 GBP|Avg: £2,317 GBP
Helzberg Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 2, 2026
Retailer 4£1,849 GBP
Retailer 8£1,909 GBP
Retailer 9£1,928 GBP
Retailer 7£1,942 GBP
Retailer 5£2,080 GBP
Retailer 12£2,115 GBP
Retailer 10£2,295 GBP
Retailer 11£2,361 GBP
Retailer 6£2,436 GBP
Retailer 2£2,501 GBP
Retailer 3£3,137 GBP
Helzberg Diamonds£3,340 GBP

8 data points across 12 retailers

12 retailers£1,849 GBP to £3,340 GBP

A
Cheapest Retailer
-
£1,849 GBP
$2,481 USD
A
Retailer 2
-
£1,909 GBP
$2,562 USD
View
B+
Retailer 3
-
£1,928 GBP
$2,587 USD
View
B+
Retailer 4
-
£1,942 GBP
$2,606 USD
View
B+
Retailer 5
-
£2,080 GBP
View
B+
Retailer 6
-
£2,115 GBP
SGD 3,836 SGD
View
B+
Retailer 7
-
£2,295 GBP
$3,080 USD
View
B+
Retailer 8
-
£2,361 GBP
$3,168 USD
View
B+
Retailer 9
-
£2,436 GBP
$3,269 USD
View
B
Retailer 10
-
£2,501 GBP
€3,196 EUR
View
Retailer 11
-
£3,137 GBP
$4,210 USD
View
Price last confirmed 16 days ago
Most Expensive
B
Helzberg Diamonds
XZRJLMLLPGKHJ · Nov 1
£3,340 GBP
$4,482 USD
View
11 more retailers have this diamond
Prices start from £1,849 GBPSave up to £1,491 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
£1,849 GBP