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Oval|Natural|GIA

1.51ct H SI2 Oval Natural Diamond

ID • H/SI2 • GIA 1548148688

Certificate GIA 1548148688

Diamond specifications and retailer prices

From £4,230 GBP
$5,668 USD
As of November 2, 2026
Save £5,431 GBP (56%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £9,661 GBP at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1.51ct natural oval diamond

This 1.51ct natural oval sits in the one-and-a-half to two 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 1548148688. Listed at 18 retailers as of October 30, 2026, with prices from £4,230 to £9,661, a £5,431 spread on the same certified stone. NZ Jewellers lists it at £9,661. 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
H
Colour
SI2
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.14°
Pavilion angle36.64°
OriginNatural
Grading LabGIA
CertificateGIA 1548148688
Dimensions9.13 × 6.40 × 3.82 mm
L/W Ratio1.43
Girdle conditionVery Thick
Key to symbols
Twinning Wisp, Feather, Cavity, Indented Natural
Top View
9.13 mm6.40 mm1.51 ctH / SI2
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1548148688
Side View
Table 59.0%Crown 39.14°Girdle: STK-VTKPavilion 36.64°Culet: NoneDepth 59.7%

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 2
Current: £9,661 GBP|Low: £4,188 GBP|High: £9,661 GBP|Avg: £5,864 GBP
NZ Jewellers
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
November 2, 2026
Retailer 4£4,230 GBP
Retailer 13£4,564 GBP
Retailer 7£4,830 GBP
Retailer 12£4,830 GBP
Retailer 14£4,871 GBP
Retailer 5£5,233 GBP
Retailer 15£5,314 GBP
Retailer 3£5,331 GBP
Retailer 8£5,446 GBP
Retailer 11£5,822 GBP
Retailer 6£6,038 GBP
Retailer 2£6,310 GBP
Retailer 10£6,365 GBP
Retailer 9£8,050 GBP
NZ Jewellers£9,661 GBP

42 data points across 15 retailers

18 retailers£4,230 GBP to £9,661 GBP

B+
Cheapest Retailer
-
£4,230 GBP
$5,668 USD
B+
Retailer 2
-
£4,564 GBP
$6,115 USD
View
B+
Retailer 3
-
£4,830 GBP
$6,472 USD
View
B+
Retailer 4
-
£4,830 GBP
$6,472 USD
View
Final sale: no returns
B+
Retailer 5
-
£4,871 GBP
$6,526 USD
View
B+
Retailer 6
-
£5,233 GBP
$7,012 USD
View
B
Retailer 7
-
£5,314 GBP
$7,120 USD
View
B
Retailer 8
-
£5,331 GBP
$7,143 USD
View
B+
Retailer 9
-
£5,446 GBP
View
B+
Retailer 10
-
£5,728 GBP
$7,675 USD
View
B+
Retailer 11
-
£5,799 GBP
$7,770 USD
View
B+
Retailer 12
-
£5,799 GBP
$7,770 USD
View
B+
Retailer 13
-
£5,822 GBP
$7,801 USD
View
B
Retailer 14
-
£5,993 GBP
$8,030 USD
View
B
Retailer 15
-
£6,038 GBP
$8,090 USD
View
B
Retailer 16
-
£6,310 GBP
€8,052 EUR
View
B
Retailer 17
-
£8,050 GBP
View
Most Expensive
B
NZ Jewellers
4d673faf-1ed0-41f7-8537-26c63027609b · Oct 30
£9,661 GBP
$12,945 USD
View
17 more retailers have this diamond
Prices start from £4,230 GBPSave up to £5,431 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 Oval
£4,230 GBP