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Round|Natural|GIA

1.50ct E SI2 Round Natural Diamond

EX • E/SI2 • GIA 2121672455

Certificate GIA 2121672455

Diamond specifications and retailer prices

From £6,942 GBP
$9,245 USD
As of October 25, 2026
Save £6,471 GBP (48%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £13,413 GBP at Diamond Quarter · As of October 29, 2026
View at Diamond Quarter

About this 1.5ct natural round diamond

This 1.5ct natural round sits in the one-and-a-half to two carat band, graded E colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2121672455. Listed at 19 retailers as of October 25, 2026, with prices from £6,942 to £13,413, a £6,471 spread on the same certified stone. Diamond Quarter lists it at £13,413. 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
E
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 2121672455
Dimensions7.32 × 7.30 × 4.55 mm
L/W Ratio1.00
Culet sizeNone
Top View
7.32 mm7.30 mm1.50 ctE / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceMedium
CertificateGIA 2121672455
Side View
Table 57.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 62.3%

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 25
Current: £9,434 GBP|Low: £6,510 GBP|High: £12,348 GBP|Avg: £9,182 GBP|+4.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 29, 2026
Retailer 4£6,942 GBP
Retailer 5£7,812 GBP
Retailer 2£8,354 GBP
Retailer 1£9,434 GBP
Retailer 6£10,279 GBP
Retailer 3£12,266 GBP

41 data points across 6 retailers

19 retailers£6,942 GBP to £13,413 GBP

B+
Cheapest Retailer
-
£6,942 GBP
$9,245 USD
B+
Retailer 2
-
£7,114 GBP
$9,473 USD
View
B+
Retailer 3
-
£7,249 GBP
$9,653 USD
View
B+
Retailer 4
-
£7,465 GBP
CA$13,807 CAD
View
B
Retailer 5
-
£7,812 GBP
$10,403 USD
View
B
Retailer 6
-
£7,812 GBP
$10,403 USD
View
Final sale: no returns
B+
Retailer 7
-
£8,354 GBP
View
B
Retailer 8
-
£8,463 GBP
$11,270 USD
View
B
Retailer 9
-
£8,594 GBP
$11,444 USD
View
B
Retailer 10
-
£9,024 GBP
$12,017 USD
View
B
Retailer 11
-
£9,139 GBP
$12,170 USD
View
B
Retailer 12
-
£9,139 GBP
$12,170 USD
View
B
Retailer 13
-
£9,434 GBP
€11,965 EUR
View
B
Retailer 14
-
£9,439 GBP
$12,570 USD
View
B
Retailer 15
-
£9,765 GBP
$13,004 USD
View
B
Retailer 16
-
£10,279 GBP
$13,688 USD
View
B
Retailer 17
-
£12,266 GBP
View
B
Retailer 18
-
£13,020 GBP
$17,339 USD
View
Most Expensive
B
Diamond Quarter
1.5SI2E2155C50DN · Oct 29
£13,413 GBP
View
18 more retailers have this diamond
Prices start from £6,942 GBPSave up to £6,471 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+
1.50ct Round
£6,942 GBP