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Round|Natural|GIA

2.50ct D SI1 Round Natural Diamond

EX • D/SI1 • GIA 1518212262

Certificate GIA 1518212262

Diamond specifications and retailer prices

From £22,555 GBP
$30,221 USD
As of October 29, 2026
Save £18,855 GBP (46%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £41,410 GBP at Diamond Quarter · As of October 29, 2026
View at Diamond Quarter

About this 2.5ct natural round diamond

This 2.5ct natural round sits in the two to three carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1518212262. Listed at 20 retailers as of October 29, 2026, with prices from £22,555 to £41,410, a £18,855 spread on the same certified stone. Diamond Quarter lists it at £41,410. 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

2.50
Carat
D
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.5°
Pavilion angle41.8°
OriginNatural
Grading LabGIA
CertificateGIA 1518212262
Dimensions8.76 × 8.82 × 5.31 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Culet sizeNone
Key to symbols
Feather, Twinning Wisp, Cloud, Natural
Top View
8.76 mm8.82 mm2.50 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1518212262
Side View
Table 61.0%Crown 32.5°Girdle: MED-STKPavilion 41.8°Culet: NoneDepth 60.5%

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: Oct 29
Current: £27,466 GBP|Low: £22,555 GBP|High: £39,814 GBP|Avg: £27,850 GBP|-1.1%
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
October 30, 2026
Retailer 11£22,555 GBP
Retailer 8£22,933 GBP
Retailer 10£24,461 GBP
Retailer 9£24,972 GBP
Retailer 12£25,176 GBP
Retailer 4£25,189 GBP
Retailer 16£25,434 GBP
Retailer 3£26,239 GBP
Retailer 17£26,449 GBP
Retailer 2£26,934 GBP
Retailer 6£27,289 GBP
Retailer 1£27,466 GBP
Retailer 7£28,338 GBP
Retailer 18£29,364 GBP
Retailer 14£29,831 GBP
Retailer 5£30,021 GBP
Retailer 19£31,540 GBP
Retailer 15£34,646 GBP
Retailer 13£39,550 GBP

28 data points across 19 retailers

20 retailers£22,555 GBP to £41,410 GBP

B+
Cheapest Retailer
-
£22,555 GBP
$30,221 USD
B+
Retailer 2
-
£22,933 GBP
$30,728 USD
View
B+
Retailer 3
-
£24,461 GBP
$32,775 USD
View
Retailer 4
-
£24,972 GBP
A$51,476 AUD
View
Price last confirmed 27 days ago
B+
Retailer 5
-
£25,176 GBP
View
B+
Retailer 6
-
£25,189 GBP
$33,751 USD
View
B+
Retailer 7
-
£25,434 GBP
CA$47,331 CAD
View
B+
Retailer 8
-
£26,239 GBP
$35,157 USD
View
B+
Retailer 9
-
£26,449 GBP
$35,439 USD
View
B
Retailer 10
-
£26,934 GBP
$36,089 USD
View
B
Retailer 11
-
£27,289 GBP
$36,564 USD
View
B+
Retailer 12
-
£27,466 GBP
View
B+
Retailer 13
-
£28,338 GBP
$37,970 USD
View
B+
Retailer 14
-
£29,364 GBP
$39,345 USD
View
B+
Retailer 15
-
£29,831 GBP
€38,067 EUR
View
B+
Retailer 16
-
£30,021 GBP
$40,225 USD
View
B
Retailer 17
-
£31,540 GBP
$42,260 USD
View
B
Retailer 18
-
£34,646 GBP
ZAR 749,958 ZAR
View
B
Retailer 19
-
£39,550 GBP
View
Most Expensive
B
Diamond Quarter
2.5SI1D1562EF73N · Oct 29
£41,410 GBP
View
19 more retailers have this diamond
Prices start from £22,555 GBPSave up to £18,855 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+
2.50ct Round
£22,555 GBP