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Round|Natural|GIA

6.21ct J IF Round Natural Diamond

EX • J/IF • GIA 1236865755

Certificate GIA 1236865755

Diamond specifications and retailer prices

From £112,275 GBP
As of November 2, 2026
Save £65,840 GBP (37%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £178,115 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 6.21ct natural round diamond

This 6.21ct natural round sits in the over five carat band, graded J colour (near-colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by GIA 1236865755. Listed at 4 retailers as of November 1, 2026, with prices from £112,275 to £178,115, a £65,840 spread on the same certified stone. MOH London lists it at £178,115. At this carat range, natural pricing varies dramatically across retailers, so the cross-retailer spread on this exact stone is your single best indicator of fair price.

The 4Cs

6.21
Carat
J
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 1236865755
Dimensions11.91 × 11.95 × 7.16 mm
L/W Ratio1.00
Star length55%
Girdle conditionFaceted
Cert comments
Minor details of polish are not shown.
Top View
11.91 mm11.95 mm6.21 ctJ / IF
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1236865755
Side View
Table 57.0%Crown 34°Girdle: THN-STKPavilion 40.6°Culet: NoneDepth 60.0%

Caratlytics Score

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

Price History

Last verified: Nov 2
Current: £178,115 GBP|Low: £111,342 GBP|High: £180,261 GBP|Avg: £137,566 GBP|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
November 2, 2026
Retailer 2£112,275 GBP
Retailer 4£120,674 GBP
Retailer 3£137,766 GBP
MOH London£178,115 GBP

20 data points across 4 retailers

4 retailers£112,275 GBP to £178,115 GBP

B+
Cheapest Retailer
-
£112,275 GBP
B
Retailer 2
-
£120,674 GBP
$161,937 USD
View
B
Retailer 3
-
£137,766 GBP
€176,070 EUR
View
Most Expensive
B
MOH London
7E80ABAE4 · Nov 1
£178,115 GBP
View
3 more retailers have this diamond
Prices start from £112,275 GBPSave up to £65,840 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+
6.21ct Round
£112,275 GBP