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Round|Natural|GIA

1.21ct E SI2 Round Natural Diamond

EX • E/SI2 • GIA 2556316311

Certificate GIA 2556316311

Diamond specifications and retailer prices

From £1,691 GBP
SGD 3,061 SGD
As of October 31, 2026
Save £1,773 GBP (51%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £3,463 GBP at Wholesale Diamonds Direct · As of October 26, 2026
View at Wholesale Diamonds Direct

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 2556316311. Listed at 12 retailers as of October 26, 2026, with prices from £1,691 to £3,463, a £1,773 spread on the same certified stone. Wholesale Diamonds Direct lists it at £3,463. 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
PolishVery Good
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 2556316311
Dimensions6.78 × 6.80 × 4.24 mm
L/W Ratio1.00
Culet sizeNone
Top View
6.78 mm6.80 mm1.21 ctE / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
CertificateGIA 2556316311
Side View
Table 56.0%Crown 36°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 62.4%

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 31
Current: £2,249 GBP|Low: £1,691 GBP|High: £3,652 GBP|Avg: £2,507 GBP|-4.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Wholesale Diamonds Direct
October 31, 2026
Retailer 8£1,691 GBP
Retailer 5£1,919 GBP
Retailer 6£2,087 GBP
Retailer 1£2,249 GBP
Retailer 2£2,312 GBP
Retailer 7£2,336 GBP
Retailer 9£2,477 GBP
Retailer 10£2,550 GBP
Retailer 4£2,573 GBP
Retailer 3£2,654 GBP
Wholesale Diamonds Direct£3,463 GBP

41 data points across 11 retailers

12 retailers£1,691 GBP to £3,463 GBP

A
Cheapest Retailer
-
£1,691 GBP
SGD 3,061 SGD
A
Retailer 2
-
£1,919 GBP
$2,571 USD
View
A
Retailer 3
-
£2,087 GBP
$2,796 USD
View
A
Retailer 4
-
£2,249 GBP
View
A
Retailer 5
-
£2,312 GBP
SGD 4,186 SGD
View
A
Retailer 6
-
£2,336 GBP
$3,130 USD
View
A
Retailer 7
-
£2,477 GBP
$3,319 USD
View
A
Retailer 8
-
£2,550 GBP
$3,416 USD
View
A
Retailer 9
-
£2,573 GBP
€3,284 EUR
View
B+
Retailer 10
-
£2,652 GBP
$3,554 USD
View
A
Retailer 11
-
£2,654 GBP
View
Most Expensive
B+
Wholesale Diamonds Direct
524836331 · Oct 26
£3,463 GBP
$4,640 USD
View
11 more retailers have this diamond
Prices start from £1,691 GBPSave up to £1,773 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
£1,691 GBP