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Marquise|Natural|GIA

1.00ct E SI2 Marquise Natural Diamond

EX • E/SI2 • GIA 3555958830

Certificate GIA 3555958830

Diamond specifications and retailer prices

From £1,522 GBP
SGD 2,755 SGD
As of October 29, 2026
Save £1,438 GBP (49%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £2,960 GBP at Helzberg Diamonds · As of October 29, 2026
View at Helzberg Diamonds

About this 1ct natural marquise diamond

This 1ct natural marquise sits in the classic one-carat band, graded E 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 3555958830. Listed at 13 retailers as of October 29, 2026, with prices from £1,522 to £2,960, a £1,438 spread on the same certified stone. Helzberg Diamonds lists it at £2,960. 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

1.00
Carat
E
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle40°
Pavilion angle40.33°
OriginNatural
Grading LabGIA
CertificateGIA 3555958830
Dimensions9.82 × 5.18 × 3.32 mm
L/W Ratio1.90
Culet sizeNone
Top View
9.82 mm5.18 mm1.00 ctE / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 3555958830
Side View
Table 59.0%Crown 40°Girdle: STK-THKPavilion 40.33°Culet: NoneDepth 64.0%

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: Oct 29
Current: £2,960 GBP|Low: £1,522 GBP|High: £3,085 GBP|Avg: £2,008 GBP|-4.1%
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
October 30, 2026
Retailer 10£1,522 GBP
Retailer 9£1,638 GBP
Retailer 11£1,652 GBP
Retailer 7£1,668 GBP
Retailer 8£1,695 GBP
Retailer 2£1,787 GBP
Retailer 5£1,799 GBP
Retailer 12£1,953 GBP
Retailer 3£1,955 GBP
Retailer 4£2,059 GBP
Retailer 6£2,127 GBP
Retailer 13£2,711 GBP
Helzberg Diamonds£2,960 GBP

37 data points across 13 retailers

13 retailers£1,522 GBP to £2,960 GBP

A
Cheapest Retailer
-
£1,522 GBP
SGD 2,755 SGD
A
Retailer 2
-
£1,638 GBP
$2,195 USD
View
A
Retailer 3
-
£1,652 GBP
$2,214 USD
View
A
Retailer 4
-
£1,668 GBP
$2,235 USD
View
A
Retailer 5
-
£1,695 GBP
$2,271 USD
View
A
Retailer 6
-
£1,787 GBP
View
A
Retailer 7
-
£1,799 GBP
SGD 3,257 SGD
View
A
Retailer 8
-
£1,953 GBP
$2,617 USD
View
A
Retailer 9
-
£1,955 GBP
$2,620 USD
View
A
Retailer 10
-
£2,059 GBP
$2,759 USD
View
A
Retailer 11
-
£2,127 GBP
€2,714 EUR
View
B+
Retailer 12
-
£2,711 GBP
$3,633 USD
View
Most Expensive
B+
Helzberg Diamonds
XZRJLLLPLOOJG · Oct 29
£2,960 GBP
$3,966 USD
View
12 more retailers have this diamond
Prices start from £1,522 GBPSave up to £1,438 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
1.00ct Marquise
£1,522 GBP