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Oval|Natural|GIA

1.51ct G SI1 Oval Natural Diamond

EX • G/SI1 • GIA 6542547818

Certificate GIA 6542547818

Diamond specifications and retailer prices

From £3,974 GBP
HK$41,600 HKD
As of November 1, 2026
Save £3,485 GBP (47%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: £8,090 GBP at Riddles Jewelry · As of October 25, 2026
View at Riddles Jewelry

About this 1.51ct natural oval diamond

This 1.51ct natural oval 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 6542547818. Listed at 22 retailers as of November 1, 2026, with a 88% 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

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

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Pavilion angle39.6°
OriginNatural
Grading LabGIA
CertificateGIA 6542547818
Dimensions8.67 × 6.32 × 4.15 mm
L/W Ratio1.37
Top View
8.67 mm6.32 mm1.51 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6542547818
Side View
Table 58.0%CrownGirdle: THK-VTKPavilion 39.6°Culet: NoneDepth 65.7%

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: £5,043 GBP|Low: £3,974 GBP|High: £10,211 GBP|Avg: £6,104 GBP|-5.7%
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
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
Retailer 20
Retailer 21
Riddles Jewelry
November 2, 2026
Retailer 20£3,974 GBP
Retailer 16£4,229 GBP
Retailer 9£4,335 GBP
Retailer 6£4,470 GBP
Retailer 3£4,476 GBP
Retailer 7£4,495 GBP
Retailer 4£4,575 GBP
Retailer 18£4,626 GBP
Retailer 17£4,672 GBP
Retailer 10£4,749 GBP
Retailer 15£4,937 GBP
Retailer 1£5,043 GBP
Retailer 5£5,215 GBP
Retailer 14£5,306 GBP
Retailer 19£5,440 GBP
Retailer 8£5,772 GBP
Retailer 12£5,847 GBP
Retailer 11£6,048 GBP
Retailer 2£6,577 GBP
Retailer 13£7,021 GBP
Retailer 21£7,459 GBP
Riddles Jewelry£8,090 GBP

26 data points across 22 retailers

22 retailers£3,974 GBP to £7,459 GBP

A
Cheapest Retailer
-
£3,974 GBP
HK$41,600 HKD
A
Retailer 2
-
£4,229 GBP
$5,666 USD
View
A
Retailer 3
-
£4,335 GBP
$5,808 USD
View
A
Retailer 4
-
£4,418 GBP
$5,920 USD
View
A
Retailer 5
-
£4,470 GBP
$5,989 USD
View
A
Retailer 6
-
£4,476 GBP
$5,998 USD
View
Final sale: no returns
A
Retailer 7
-
£4,495 GBP
$6,023 USD
View
A
Retailer 8
-
£4,575 GBP
$6,130 USD
View
B+
Retailer 9
-
£4,626 GBP
A$9,535 AUD
View
A
Retailer 10
-
£4,672 GBP
$6,260 USD
View
B+
Retailer 11
-
£4,749 GBP
$6,363 USD
View
B+
Retailer 12
-
£4,937 GBP
View
B+
Retailer 13
-
£5,043 GBP
View
B+
Retailer 14
-
£5,215 GBP
$6,987 USD
View
B+
Retailer 15
-
£5,440 GBP
€6,942 EUR
View
B+
Retailer 16
-
£5,772 GBP
$7,734 USD
View
B+
Retailer 17
-
£5,847 GBP
€7,461 EUR
View
Retailer 18
-
£6,048 GBP
$8,104 USD
View
Price last confirmed 21 days ago
B+
Retailer 19
-
£6,577 GBP
ZAR 142,356 ZAR
View
Retailer 20
-
£7,021 GBP
A$14,473 AUD
View
Price last confirmed 39 days ago
B
Retailer 21
-
£7,459 GBP
View
Most Expensive
Riddles Jewelry
1985031488 · Oct 25
£8,090 GBP
$10,840 USD
View
Price last confirmed 8 days ago
21 more retailers have this diamond
Prices start from £3,974 GBPSave up to £3,485 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
1.51ct Oval
£3,974 GBP