Oval|Natural|GIA

1.51ct I SI1 Oval Natural Diamond

EX • I/SI1 • GIA 1538354461

Certificate GIA 1538354461

Diamond specifications and retailer prices

From £4,080 GBP
$5,475 USD
As of November 1, 2026
Save £3,528 GBP (46%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £8,637 GBP at NZ Jewellers · As of September 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 I 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 1538354461. Listed at 20 retailers as of November 1, 2026, with a 86% 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
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1538354461
Dimensions9.42 × 6.18 × 3.94 mm
L/W Ratio1.52
Culet sizeNone
Key to symbols
Twinning Wisp, Cloud, Feather, Crystal, Needle
Top View
9.42 mm6.18 mm1.51 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 1538354461
Side View
Table 60.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 63.7%

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 1
Current: £4,678 GBP|Low: £3,403 GBP|High: £7,700 GBP|Avg: £5,018 GBP
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
November 2, 2026
Retailer 21£3,599 GBP
Retailer 10£4,034 GBP
Retailer 6£4,080 GBP
Retailer 19£4,083 GBP
Retailer 9£4,134 GBP
Retailer 2£4,352 GBP
Retailer 5£4,610 GBP
Retailer 1£4,678 GBP
Retailer 3£4,678 GBP
Retailer 12£4,764 GBP
Retailer 8£4,866 GBP
Retailer 16£4,952 GBP
Retailer 20£5,025 GBP
Retailer 11£5,112 GBP
Retailer 13£5,112 GBP
Retailer 7£5,283 GBP
Retailer 14£5,284 GBP
Retailer 15£5,328 GBP
Retailer 18£6,345 GBP
Retailer 4£7,486 GBP
Retailer 17£7,608 GBP

19 data points across 21 retailers

20 retailers£4,080 GBP to £7,608 GBP

B+
Cheapest Retailer
-
£4,080 GBP
$5,475 USD
B+
Retailer 2
-
£4,083 GBP
$5,479 USD
View
B+
Retailer 3
-
£4,134 GBP
$5,548 USD
View
B+
Retailer 4
-
£4,352 GBP
$5,840 USD
View
B+
Retailer 5
-
£4,610 GBP
$6,186 USD
View
Retailer 6
-
£4,678 GBP
$6,278 USD
View
Price last confirmed 34 days ago
B+
Retailer 7
-
£4,678 GBP
$6,278 USD
View
B+
Retailer 8
-
£4,764 GBP
$6,393 USD
View
B+
Retailer 9
-
£4,866 GBP
$6,530 USD
View
B+
Retailer 10
-
£4,952 GBP
View
Retailer 11
-
£5,025 GBP
A$10,375 AUD
View
Price last confirmed 33 days ago
B+
Retailer 12
-
£5,112 GBP
$6,860 USD
View
B+
Retailer 13
-
£5,112 GBP
$6,860 USD
View
B
Retailer 14
-
£5,283 GBP
$7,090 USD
View
B+
Retailer 15
-
£5,328 GBP
€6,810 EUR
View
Retailer 16
-
£5,398 GBP
$7,244 USD
View
Price last confirmed 34 days ago
B
Retailer 17
-
£6,345 GBP
ZAR 137,544 ZAR
View
Retailer 18
-
£7,486 GBP
$10,046 USD
View
Price last confirmed 10 days ago
B
Retailer 19
-
£7,608 GBP
View
Most Expensive
NZ Jewellers
8c5a149f-dfc4-4f0c-9fca-f24f50bf74f7 · Sep 30
£8,637 GBP
$11,590 USD
View
Price last confirmed 33 days ago
19 more retailers have this diamond
Prices start from £4,080 GBPSave up to £3,528 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
£4,080 GBP