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Marquise|Natural|GIA

1.01ct D SI2 Marquise Natural Diamond

EX • D/SI2 • GIA 1553986435

Certificate GIA 1553986435

Diamond specifications and retailer prices

From £1,827 GBP
As of November 5, 2026
Save £1,496 GBP (45%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £3,323 GBP at Helzberg Diamonds · As of November 6, 2026
View at Helzberg Diamonds

About this 1.01ct natural marquise diamond

This 1.01ct natural marquise sits in the classic one-carat band, graded D colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1553986435. Listed at 11 retailers as of November 5, 2026, with prices from £1,827 to £3,323, a £1,496 spread on the same certified stone. Helzberg Diamonds lists it at £3,323. 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

1.01
Carat
D
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.53°
Pavilion angle40.82°
OriginNatural
Grading LabGIA
CertificateGIA 1553986435
Dimensions9.99 × 5.27 × 3.33 mm
L/W Ratio1.90
Culet sizeNone
Top View
9.99 mm5.27 mm1.01 ctD / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1553986435
Side View
Table 59.0%Crown 37.53°Girdle: STK-THKPavilion 40.82°Culet: NoneDepth 63.1%

Caratlytics Score

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

Price History

Last verified: Nov 5
Current: £3,323 GBP|Low: £1,817 GBP|High: £3,444 GBP|Avg: £2,324 GBP|-3.5%
Helzberg Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 5£1,827 GBP
Retailer 11£1,864 GBP
Retailer 6£1,934 GBP
Retailer 3£1,940 GBP
Retailer 4£2,055 GBP
Retailer 10£2,105 GBP
Retailer 8£2,267 GBP
Retailer 9£2,351 GBP
Retailer 2£2,481 GBP
Retailer 7£3,160 GBP
Helzberg Diamonds£3,323 GBP

44 data points across 11 retailers

11 retailers£1,827 GBP to £3,323 GBP

A
Cheapest Retailer
-
£1,827 GBP
A
Retailer 2
-
£1,864 GBP
View
A
Retailer 3
-
£1,934 GBP
View
A
Retailer 4
-
£1,940 GBP
View
A
Retailer 5
-
£2,055 GBP
View
A
Retailer 6
-
£2,105 GBP
View
A
Retailer 7
-
£2,267 GBP
View
A
Retailer 8
-
£2,351 GBP
View
A
Retailer 9
-
£2,481 GBP
View
B+
Retailer 10
-
£3,160 GBP
View
Most Expensive
B
Helzberg Diamonds
XZRHLLJPOMKJL · Nov 6
£3,323 GBP
$4,473 USD
View
10 more retailers have this diamond
Prices start from £1,827 GBPSave up to £1,496 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
1.01ct Marquise
£1,827 GBP