Radiant|Natural|GIA

1.21ct E SI1 Radiant Natural Diamond

ID • E/SI1 • GIA 6551135368

Certificate GIA 6551135368

Diamond specifications and retailer prices

From $3,840 USD
£3,024 GBP
Save $3,263 USD (46%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $7,103 USD at MOH London
View at MOH London

About this 1.21ct natural radiant diamond

This 1.21ct natural radiant sits in the classic one-carat band, graded E 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 6551135368. Listed at 6 retailers, with prices from $3,840 to $7,103 at MOH London, a $3,263 spread on the same certified stone. 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
Color
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle49.79°
Pavilion angle35.87°
OriginNatural
Grading LabGIA
CertificateGIA 6551135368
Dimensions7.10 × 5.43 × 3.66 mm
L/W Ratio1.31
Top View
7.10 mm5.43 mm1.21 ctE / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6551135368
Side View
Table 70.0%Crown 49.79°Girdle: Slightly ThickPavilion 35.87°Culet: NoneDepth 67.5%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0-100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 1
Current: $7,103 USD|Low: $3,779 USD|High: $7,130 USD|Avg: $4,459 USD|+0.6%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
October 1, 2026
Retailer 6$3,822 USD
Retailer 4$3,832 USD
Retailer 5$4,230 USD
Retailer 3$4,481 USD
Retailer 7$4,673 USD
Retailer 2$4,735 USD
MOH London$7,103 USD

36 data points across 7 retailers

6 retailers$3,840 USD to $7,103 USD

B+
Retailer 1
-
$3,822 USD
Price last confirmed 31 days ago
B+
Retailer 2
-
$3,840 USD
£3,024 GBP
View
B
Retailer 3
-
$4,230 USD
View
Price last confirmed 9 days ago
B+
Retailer 4
-
$4,481 USD
A$6,894 AUD
View
B
Retailer 5
-
$4,735 USD
View
Most Expensive
B
MOH London
FD79509F1 · Oct 1
$7,103 USD
£5,593 GBP
View
5 more retailers have this diamond
Prices start from $3,840 USDSave up to $3,263 USD

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.

B+
1.21ct Radiant
$3,840 USD