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Marquise|Natural|GIA

1.51ct G SI1 Marquise Natural Diamond

ID • G/SI1 • GIA 6545876663

Certificate GIA 6545876663

Diamond specifications and retailer prices

From £7,895 GBP
$10,595 USD
As of November 1, 2026
Save £4,606 GBP (37%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £12,502 GBP at Cape Diamonds · As of October 31, 2026
View at Cape Diamonds

About this 1.51ct natural marquise diamond

This 1.51ct natural marquise sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6545876663. Listed at 11 retailers as of October 31, 2026, with prices from £7,895 to £12,502, a £4,606 spread on the same certified stone. Cape Diamonds lists it at £12,502. 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

1.51
Carat
G
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle38.2°
Pavilion angle39.2°
OriginNatural
Grading LabGIA
CertificateGIA 6545876663
Dimensions11.47 × 6.07 × 3.73 mm
L/W Ratio1.89
Top View
11.47 mm6.07 mm1.51 ctG / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6545876663
Side View
Table 60.0%Crown 38.2°Girdle: THK-VTKPavilion 39.2°Culet: NoneDepth 61.4%

Caratlytics Score

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

Price History

Last verified: Nov 1
Current: £12,502 GBP|Low: £7,895 GBP|High: £12,502 GBP|Avg: £9,715 GBP|+3.1%
Cape Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 2, 2026
Retailer 10£7,895 GBP
Retailer 7£8,391 GBP
Retailer 4£9,204 GBP
Retailer 5£9,409 GBP
Retailer 8£9,414 GBP
Retailer 9£9,896 GBP
Retailer 11£9,896 GBP
Retailer 2£10,025 GBP
Retailer 6£10,151 GBP
Retailer 3£10,224 GBP
Cape Diamonds£12,502 GBP

43 data points across 11 retailers

11 retailers£7,895 GBP to £12,502 GBP

B+
Cheapest Retailer
-
£7,895 GBP
$10,595 USD
B
Retailer 2
-
£8,391 GBP
$11,260 USD
View
B+
Retailer 3
-
£9,204 GBP
View
B
Retailer 4
-
£9,409 GBP
$12,626 USD
View
B
Retailer 5
-
£9,414 GBP
$12,633 USD
View
B
Retailer 6
-
£9,896 GBP
$13,280 USD
View
B
Retailer 7
-
£9,896 GBP
$13,280 USD
View
B
Retailer 8
-
£10,025 GBP
€12,812 EUR
View
B
Retailer 9
-
£10,151 GBP
$13,622 USD
View
B
Retailer 10
-
£10,224 GBP
$13,720 USD
View
Most Expensive
B
Cape Diamonds
cert_6545876663 · Oct 31
£12,502 GBP
ZAR 271,026 ZAR
View
10 more retailers have this diamond
Prices start from £7,895 GBPSave up to £4,606 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+
1.51ct Marquise
£7,895 GBP