Oval|Natural|GIA

1.50ct D SI1 Oval Natural Diamond

EX • D/SI1 • GIA 6551278598

Certificate GIA 6551278598

Diamond specifications and retailer prices

From £3,582 GBP
HK$37,500 HKD
As of October 31, 2026
Save £3,554 GBP (50%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £9,890 GBP at NZ Jewellers · As of August 30, 2026
View at NZ Jewellers

About this 1.5ct natural oval diamond

This 1.5ct 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 6551278598. Listed at 18 retailers as of October 29, 2026, with a 99% 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

1.50
Carat
D
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 6551278598
Dimensions8.92 × 6.52 × 4.11 mm
L/W Ratio1.37
Culet sizeNone
Key to symbols
Twinning Wisp, Feather
Top View
8.92 mm6.52 mm1.50 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 6551278598
Side View
Table 58.0%CrownGirdlePavilionCulet: NoneDepth 63.0%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: £3,582 GBP|Low: £3,544 GBP|High: £7,945 GBP|Avg: £4,984 GBP|-11.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 31, 2026
Retailer 1£3,582 GBP
Retailer 12£4,080 GBP
Retailer 2£4,202 GBP
Retailer 10£4,214 GBP
Retailer 11£4,447 GBP
Retailer 9£4,478 GBP
Retailer 5£4,622 GBP
Retailer 4£4,656 GBP
Retailer 3£4,763 GBP
Retailer 6£5,265 GBP
Retailer 8£5,867 GBP
Retailer 7£7,136 GBP

36 data points across 12 retailers

18 retailers£3,582 GBP to £7,136 GBP

A
Cheapest Retailer
-
£3,582 GBP
HK$37,500 HKD
Retailer 2
-
£4,080 GBP
SGD 7,388 SGD
View
Price last confirmed 17 days ago
A
Retailer 3
-
£4,202 GBP
$5,630 USD
View
A
Retailer 4
-
£4,214 GBP
$5,646 USD
View
A
Retailer 5
-
£4,447 GBP
$5,958 USD
View
Final sale: no returns
A
Retailer 6
-
£4,478 GBP
$6,000 USD
View
Retailer 7
-
£4,574 GBP
$6,128 USD
View
Price last confirmed 23 days ago
A
Retailer 8
-
£4,622 GBP
View
Retailer 9
-
£4,763 GBP
A$9,818 AUD
View
Price last confirmed 21 days ago
Retailer 10
-
£4,818 GBP
$6,455 USD
View
Price last confirmed 21 days ago
A
Retailer 11
-
£5,265 GBP
€6,718 EUR
View
Retailer 12
-
£5,588 GBP
$7,487 USD
View
Price last confirmed 31 days ago
Retailer 13
-
£5,717 GBP
$7,660 USD
View
Price last confirmed 22 days ago
B+
Retailer 14
-
£5,867 GBP
ZAR 126,995 ZAR
View
Retailer 15
-
£6,666 GBP
$8,932 USD
View
Price last confirmed 46 days ago
B+
Retailer 16
-
£7,136 GBP
View
Retailer 17
-
£8,287 GBP
$11,104 USD
View
Price last confirmed 22 days ago
Most Expensive
NZ Jewellers
5d398fb2-e47e-4d8d-9c9c-99cae6142bd8 · Aug 30
£9,890 GBP
$13,252 USD
View
Price last confirmed 62 days ago
17 more retailers have this diamond
Prices start from £3,582 GBPSave up to £3,554 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
1.50ct Oval
£3,582 GBP