Marquise|Natural|GIA

1.00ct H SI2 Marquise Natural Diamond

EX • H/SI2 • GIA 6551141394

Certificate GIA 6551141394

Diamond specifications and retailer prices

From £1,987 GBP
As of November 5, 2026
Save £314 GBP (14%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £4,713 GBP at NZ Jewellers · As of October 17, 2026
View at NZ Jewellers

About this 1ct natural marquise diamond

This 1ct natural marquise sits in the classic one-carat band, graded H 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 6551141394. Listed at 18 retailers as of November 5, 2026, with a relatively tight 16% spread, which is unusual at this carat range and suggests competitive pricing across the listings. 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
H
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6551141394
Dimensions11.42 × 5.02 × 2.87 mm
L/W Ratio2.27
Top View
11.42 mm5.02 mm1.00 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6551141394
Side View
Table 62.0%CrownGirdle: THN-VTKPavilionCulet: NoneDepth 57.3%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: £1,987 GBP|Low: £1,682 GBP|High: £3,896 GBP|Avg: £2,438 GBP|+0.2%
Retailer 1
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
November 5, 2026
Retailer 14£1,682 GBP
Retailer 9£1,772 GBP
Retailer 1£1,987 GBP
Retailer 12£2,066 GBP
Retailer 13£2,080 GBP
Retailer 4£2,109 GBP
Retailer 5£2,300 GBP
Retailer 6£2,330 GBP
Retailer 2£2,360 GBP
Retailer 3£2,360 GBP
Retailer 8£2,363 GBP
Retailer 10£2,619 GBP
Retailer 11£3,789 GBP
Retailer 7£3,847 GBP

32 data points across 14 retailers

18 retailers£1,987 GBP to £2,300 GBP

Retailer 1
-
£1,682 GBP
Price last confirmed 15 days ago
Retailer 2
-
£1,772 GBP
View
Price last confirmed 17 days ago
B+
Retailer 3
-
£1,987 GBP
View
B+
Retailer 4
-
£2,109 GBP
View
Retailer 5
-
£2,254 GBP
View
Price last confirmed 21 days ago
Retailer 6
-
£2,254 GBP
View
Price last confirmed 19 days ago
B+
Retailer 7
-
£2,300 GBP
View
Retailer 8
-
£2,330 GBP
View
Price last confirmed 45 days ago
Retailer 9
-
£2,341 GBP
View
Price last confirmed 21 days ago
Retailer 10
-
£2,360 GBP
View
Price last confirmed 19 days ago
Retailer 11
-
£2,360 GBP
View
Price last confirmed 16 days ago
Retailer 12
-
£2,363 GBP
View
Price last confirmed 16 days ago
Retailer 13
-
£2,601 GBP
View
Price last confirmed 18 days ago
Retailer 14
-
£2,689 GBP
View
Price last confirmed 45 days ago
Retailer 15
-
£3,789 GBP
View
Price last confirmed 16 days ago
Retailer 16
-
£3,847 GBP
View
Price last confirmed 15 days ago
Retailer 17
-
£4,060 GBP
View
Price last confirmed 47 days ago
Most Expensive
NZ Jewellers
acc5bc18-4dfb-4497-ac9f-97afada2c82f · Oct 17
£4,713 GBP
$6,308 USD
View
Price last confirmed 19 days ago
17 more retailers have this diamond
Prices start from £1,987 GBPSave up to £314 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+
1.00ct Marquise
£1,987 GBP