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Round|Natural|GIA

6.59ct G SI2 Round Natural Diamond

EX • G/SI2 • GIA 5202809839

Certificate GIA 5202809839

Diamond specifications and retailer prices

From £121,989 GBP
$163,452 USD
As of October 31, 2026
Save £45,584 GBP (27%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £167,573 GBP at Yorxs · As of October 31, 2026
View at Yorxs

About this 6.59ct natural round diamond

This 6.59ct natural round sits in the over five carat band, graded G colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 5202809839. Listed at 8 retailers as of October 31, 2026, with prices from £121,989 to £167,573, a £45,584 spread on the same certified stone. Yorxs lists it at £167,573. 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

6.59
Carat
G
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 5202809839
Dimensions12.32 × 12.40 × 7.21 mm
L/W Ratio1.01
Top View
12.32 mm12.40 mm6.59 ctG / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 5202809839
Side View
Table 60.0%CrownGirdle: THN-MEDPavilionCulet: NoneDepth 58.3%

Caratlytics Score

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

Price History

Last verified: Oct 31
Current: £148,415 GBP|Low: £121,989 GBP|High: £167,573 GBP|Avg: £139,457 GBP|+0.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Yorxs
November 1, 2026
Retailer 5£121,989 GBP
Retailer 2£127,517 GBP
Retailer 3£134,654 GBP
Retailer 4£139,258 GBP
Retailer 1£148,415 GBP
Yorxs£167,573 GBP

43 data points across 6 retailers

8 retailers£121,989 GBP to £167,573 GBP

B+
Cheapest Retailer
-
£121,989 GBP
$163,452 USD
B
Retailer 2
-
£123,260 GBP
$165,155 USD
View
B+
Retailer 3
-
£127,517 GBP
₹16,272,197 INR
View
B
Retailer 4
-
£134,654 GBP
$180,421 USD
View
Retailer 5
-
£134,654 GBP
$180,421 USD
View
Price last confirmed 25 days ago
B
Retailer 6
-
£139,258 GBP
$186,590 USD
View
Final sale: no returns
B
Retailer 7
-
£148,415 GBP
View
Most Expensive
B
Yorxs
TIM1528 · Oct 31
£167,573 GBP
€213,838 EUR
View
7 more retailers have this diamond
Prices start from £121,989 GBPSave up to £45,584 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+
6.59ct Round
£121,989 GBP