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Marquise|Natural|GIA

1.30ct E SI1 Marquise Natural Diamond

EX • E/SI1 • GIA 6551891799

Certificate GIA 6551891799

Diamond specifications and retailer prices

From £4,655 GBP
As of November 1, 2026
Save £3,658 GBP (44%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £10,004 GBP at NZ Jewellers · As of September 25, 2026
View at NZ Jewellers

About this 1.3ct natural marquise diamond

This 1.3ct natural marquise sits in the one-and-a-quarter to one-and-a-half carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6551891799. Listed at 13 retailers as of November 1, 2026, with a 79% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.30
Carat
E
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6551891799
Dimensions10.88 × 5.73 × 3.66 mm
L/W Ratio1.90
Girdle conditionFaceted
Culet sizeNone
Top View
10.88 mm5.73 mm1.30 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6551891799
Side View
Table 63.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 63.9%

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 1
Current: £6,150 GBP|Low: £4,655 GBP|High: £8,435 GBP|Avg: £6,298 GBP|-3.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 7£4,655 GBP
Retailer 3£5,586 GBP
Retailer 6£5,731 GBP
Retailer 8£5,988 GBP
Retailer 9£5,988 GBP
Retailer 1£6,150 GBP
Retailer 10£6,189 GBP
Retailer 2£6,589 GBP
Retailer 4£7,297 GBP
Retailer 5£8,313 GBP

32 data points across 10 retailers

13 retailers£4,655 GBP to £8,313 GBP

A
Cheapest Retailer
-
£4,655 GBP
Retailer 2
-
£5,419 GBP
View
Price last confirmed 45 days ago
B+
Retailer 3
-
£5,586 GBP
View
Retailer 4
-
£5,731 GBP
View
Price last confirmed 15 days ago
B+
Retailer 5
-
£5,988 GBP
View
B+
Retailer 6
-
£5,988 GBP
View
B+
Retailer 7
-
£6,150 GBP
View
B+
Retailer 8
-
£6,189 GBP
View
Retailer 9
-
£6,252 GBP
View
Price last confirmed 43 days ago
Retailer 10
-
£6,589 GBP
View
Price last confirmed 14 days ago
B+
Retailer 11
-
£7,297 GBP
View
B
Retailer 12
-
£8,313 GBP
View
Most Expensive
NZ Jewellers
c10a64fd-b190-4958-b15c-cc64b9bcd4a7 · Sep 25
£10,004 GBP
$13,464 USD
View
Price last confirmed 42 days ago
12 more retailers have this diamond
Prices start from £4,655 GBPSave up to £3,658 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
1.30ct Marquise
£4,655 GBP