Oval|Natural|GIA

1.51ct D SI1 Oval Natural Diamond

EX • D/SI1 • GIA 1285728814

Certificate GIA 1285728814

Diamond specifications and retailer prices

From £8,348 GBP
$11,185 USD
As of October 28, 2026
Save £6,537 GBP (44%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £14,885 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 1.51ct natural oval diamond

This 1.51ct natural oval sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1285728814. Listed at 19 retailers as of October 28, 2026, with prices from £8,348 to £14,885, a £6,537 spread on the same certified stone. MOH London lists it at £14,885. 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
D
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1285728814
Dimensions8.56 × 6.58 × 4.11 mm
L/W Ratio1.30
Culet sizeNone
Top View
8.56 mm6.58 mm1.51 ctD / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 1285728814
Side View
Table 59.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 62.5%

Caratlytics Score

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B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 28
Current: £14,885 GBP|Low: £8,348 GBP|High: £14,984 GBP|Avg: £11,197 GBP|+0.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 31, 2026
Retailer 7£8,348 GBP
Retailer 3£9,480 GBP
Retailer 8£10,112 GBP
Retailer 4£10,118 GBP
Retailer 6£10,177 GBP
Retailer 10£10,270 GBP
Retailer 11£10,665 GBP
Retailer 2£11,405 GBP
Retailer 9£13,430 GBP
Retailer 5£13,854 GBP
MOH London£14,885 GBP

44 data points across 11 retailers

19 retailers£8,348 GBP to £14,885 GBP

B+
Cheapest Retailer
-
£8,348 GBP
$11,185 USD
B
Retailer 2
-
£8,795 GBP
$11,785 USD
View
B
Retailer 3
-
£8,807 GBP
$11,801 USD
View
B
Retailer 4
-
£8,859 GBP
CA$16,486 CAD
View
B
Retailer 5
-
£9,325 GBP
$12,495 USD
View
B
Retailer 6
-
£9,480 GBP
$12,702 USD
View
B
Retailer 7
-
£10,112 GBP
$13,549 USD
View
B
Retailer 8
-
£10,118 GBP
View
Retailer 9
-
£10,177 GBP
A$20,979 AUD
View
Price last confirmed 7 days ago
B
Retailer 10
-
£10,270 GBP
$13,761 USD
View
B
Retailer 11
-
£10,665 GBP
$14,290 USD
View
B
Retailer 12
-
£10,881 GBP
$14,580 USD
View
B
Retailer 13
-
£10,881 GBP
$14,580 USD
View
B
Retailer 14
-
£10,986 GBP
$14,720 USD
View
B
Retailer 15
-
£11,247 GBP
$15,070 USD
View
B
Retailer 16
-
£11,405 GBP
€14,554 EUR
View
B
Retailer 17
-
£13,430 GBP
$17,995 USD
View
B
Retailer 18
-
£13,854 GBP
ZAR 299,876 ZAR
View
Most Expensive
B
MOH London
6AEEE2EE4 · Oct 29
£14,885 GBP
View
18 more retailers have this diamond
Prices start from £8,348 GBPSave up to £6,537 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
£8,348 GBP