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Round|Natural|GIA

1.21ct E SI2 Round Natural Diamond

EX • E/SI2 • GIA 1509523552

Certificate GIA 1509523552

Diamond specifications and retailer prices

From £2,315 GBP
As of October 30, 2026
Save £2,241 GBP (49%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £4,556 GBP at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1.21ct natural round diamond

This 1.21ct natural round sits in the classic one-carat band, graded E colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1509523552. Listed at 12 retailers as of October 30, 2026, with prices from £2,315 to £4,556, a £2,241 spread on the same certified stone. NZ Jewellers lists it at £4,556. 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

1.21
Carat
E
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 1509523552
Dimensions6.75 × 6.80 × 4.23 mm
L/W Ratio1.01
Top View
6.75 mm6.80 mm1.21 ctE / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 1509523552
Side View
Table 59.0%CrownGirdle: Slightly ThickPavilionCulet: NoneDepth 62.0%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: £2,716 GBP|Low: £2,307 GBP|High: £4,425 GBP|Avg: £2,972 GBP|+2.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 31, 2026
Retailer 2£2,315 GBP
Retailer 5£2,321 GBP
Retailer 6£2,715 GBP
Retailer 1£2,716 GBP
Retailer 3£3,062 GBP
Retailer 4£4,396 GBP

44 data points across 6 retailers

12 retailers£2,315 GBP to £4,556 GBP

A
Cheapest Retailer
-
£2,315 GBP
A
Retailer 2
-
£2,321 GBP
$3,110 USD
View
Retailer 3
-
£2,370 GBP
$3,175 USD
View
Price last confirmed 36 days ago
A
Retailer 4
-
£2,614 GBP
$3,503 USD
View
A
Retailer 5
-
£2,614 GBP
$3,503 USD
View
B+
Retailer 6
-
£2,714 GBP
SGD 4,915 SGD
View
B+
Retailer 7
-
£2,715 GBP
$3,638 USD
View
A
Retailer 8
-
£2,716 GBP
View
B+
Retailer 9
-
£3,017 GBP
$4,042 USD
View
B+
Retailer 10
-
£3,062 GBP
€3,907 EUR
View
B
Retailer 11
-
£4,396 GBP
View
Most Expensive
B
NZ Jewellers
f9f848ad-713c-47f4-a762-4686ae3f456c · Oct 30
£4,556 GBP
$6,104 USD
View
11 more retailers have this diamond
Prices start from £2,315 GBPSave up to £2,241 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
1.21ct Round
£2,315 GBP