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Marquise|Natural|GIA

1.51ct G SI1 Marquise Natural Diamond

EX • G/SI1 • GIA 6551543873

Certificate GIA 6551543873

Diamond specifications and retailer prices

From £7,058 GBP
$9,472 USD
As of November 1, 2026
Save £5,621 GBP (44%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £12,679 GBP at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

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 6551543873. Listed at 17 retailers as of October 30, 2026, with prices from £7,058 to £12,679, a £5,621 spread on the same certified stone. NZ Jewellers lists it at £12,679. 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
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle36.97°
Pavilion angle41.43°
OriginNatural
Grading LabGIA
CertificateGIA 6551543873
Dimensions11.30 × 5.97 × 3.78 mm
L/W Ratio1.89
Culet sizeNone
Top View
11.30 mm5.97 mm1.51 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6551543873
Side View
Table 60.0%Crown 36.97°Girdle: THN-THKPavilion 41.43°Culet: NoneDepth 63.3%

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: £8,572 GBP|Low: £8,150 GBP|High: £12,025 GBP|Avg: £9,369 GBP|-1.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 3£8,150 GBP
Retailer 9£8,242 GBP
Retailer 8£8,368 GBP
Retailer 7£8,460 GBP
Retailer 1£8,572 GBP
Retailer 6£8,723 GBP
Retailer 2£9,583 GBP
Retailer 5£11,177 GBP
Retailer 4£11,882 GBP

43 data points across 9 retailers

17 retailers£7,058 GBP to £12,679 GBP

B+
Cheapest Retailer
-
£7,058 GBP
$9,472 USD
B+
Retailer 2
-
£7,523 GBP
$10,095 USD
View
Retailer 3
-
£7,608 GBP
$10,209 USD
View
Price last confirmed 17 days ago
Retailer 4
-
£7,671 GBP
$10,294 USD
View
Price last confirmed 11 days ago
B+
Retailer 5
-
£8,115 GBP
$10,890 USD
View
B+
Retailer 6
-
£8,150 GBP
View
B+
Retailer 7
-
£8,242 GBP
$11,060 USD
View
B
Retailer 8
-
£8,368 GBP
$11,230 USD
View
Retailer 9
-
£8,460 GBP
A$17,466 AUD
View
Price last confirmed 29 days ago
B+
Retailer 10
-
£8,572 GBP
View
B+
Retailer 11
-
£8,723 GBP
$11,706 USD
View
B
Retailer 12
-
£9,509 GBP
$12,761 USD
View
B
Retailer 13
-
£9,583 GBP
€12,247 EUR
View
Retailer 14
-
£10,009 GBP
$13,431 USD
View
Price last confirmed 10 days ago
B
Retailer 15
-
£11,177 GBP
ZAR 242,301 ZAR
View
B
Retailer 16
-
£11,882 GBP
View
Most Expensive
B
NZ Jewellers
04e58fd2-03b5-4f0a-8a02-4f720a580b04 · Oct 30
£12,679 GBP
$17,015 USD
View
16 more retailers have this diamond
Prices start from £7,058 GBPSave up to £5,621 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
£7,058 GBP