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Round|Natural|GIA

1.21ct J SI2 Round Natural Diamond

VG • J/SI2 • GIA 6204620321

Certificate GIA 6204620321

Diamond specifications and retailer prices

From £3,732 GBP
$5,000 USD
As of October 31, 2026
Save £453 GBP (11%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £6,194 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 1.21ct natural round diamond

This 1.21ct natural round sits in the classic one-carat band, graded J colour (near-colourless) and SI2 clarity (slightly-included), with a very-good cut grade and certified by GIA 6204620321. Listed at 8 retailers as of October 29, 2026, with a relatively tight 12% spread, which is unusual at this carat range and suggests competitive pricing across the listings. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.21
Carat
J
Colour
SI2
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishGood
SymmetryVery Good
FluorescenceNone
Crown angle33.5°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 6204620321
Dimensions6.91 × 6.87 × 4.21 mm
L/W Ratio1.01
Top View
6.91 mm6.87 mm1.21 ctJ / SI2
OriginNatural
CutVery Good
PolishGood
SymmetryVery Good
FluorescenceNone
CertificateGIA 6204620321
Side View
Table 57.0%Crown 33.5°Girdle: VTN-MEDPavilion 41.2°Culet: NoneDepth 61.1%

Caratlytics Score

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B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: £6,194 GBP|Low: £3,026 GBP|High: £6,235 GBP|Avg: £4,265 GBP|+0.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
October 31, 2026
Retailer 4£3,026 GBP
Retailer 5£3,732 GBP
Retailer 2£3,841 GBP
Retailer 3£4,185 GBP
MOH London£6,194 GBP

38 data points across 5 retailers

8 retailers£3,732 GBP to £4,185 GBP

Retailer 1
-
£3,026 GBP
$4,055 USD
Price last confirmed 10 days ago
C
Retailer 2
-
£3,732 GBP
$5,000 USD
View
B
Retailer 3
-
£3,841 GBP
View
C
Retailer 4
-
£3,970 GBP
$5,320 USD
View
C
Retailer 5
-
£3,970 GBP
$5,320 USD
View
C
Retailer 6
-
£4,105 GBP
$5,500 USD
View
B
Retailer 7
-
£4,185 GBP
€5,340 EUR
View
Most Expensive
MOH London
CFF297CD8 · Oct 29
£6,194 GBP
View
Price under review
7 more retailers have this diamond
Prices start from £3,732 GBPSave up to £453 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
1.21ct Round
£3,732 GBP