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Round|Natural|GIA

1.29ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 2566181093

Certificate GIA 2566181093

Diamond specifications and retailer prices

From £1,600 GBP
As of November 5, 2026
Save £1,207 GBP (43%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £2,808 GBP at Wholesale Diamonds Direct · As of November 6, 2026
View at Wholesale Diamonds Direct

About this 1.29ct natural round diamond

This 1.29ct natural round sits in the one-and-a-quarter to one-and-a-half carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2566181093. Listed at 12 retailers as of November 5, 2026, with prices from £1,600 to £2,808, a £1,207 spread on the same certified stone. Wholesale Diamonds Direct lists it at £2,808. 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

1.29
Carat
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle36.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 2566181093
Dimensions6.90 × 4.36 × 4.36 mm
L/W Ratio1.58
Culet sizeNone
Top View
6.90 mm4.36 mm1.29 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2566181093
Side View
Table 56.0%Crown 36.5°Girdle: THN-STKPavilion 41°Culet: NoneDepth 62.9%

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: Nov 5
Current: £2,167 GBP|Low: £1,591 GBP|High: £2,947 GBP|Avg: £2,077 GBP|-4.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Wholesale Diamonds Direct
November 6, 2026
Retailer 6£1,600 GBP
Retailer 2£1,622 GBP
Retailer 9£1,682 GBP
Retailer 8£1,714 GBP
Retailer 4£1,838 GBP
Retailer 11£1,881 GBP
Retailer 10£2,139 GBP
Retailer 7£2,144 GBP
Retailer 1£2,167 GBP
Retailer 5£2,208 GBP
Retailer 3£2,635 GBP
Wholesale Diamonds Direct£2,808 GBP

31 data points across 12 retailers

12 retailers£1,600 GBP to £2,808 GBP

A
Cheapest Retailer
-
£1,600 GBP
A
Retailer 2
-
£1,622 GBP
View
A
Retailer 3
-
£1,682 GBP
View
A
Retailer 4
-
£1,714 GBP
View
A
Retailer 5
-
£1,838 GBP
View
A
Retailer 6
-
£1,881 GBP
View
B+
Retailer 7
-
£2,139 GBP
View
B+
Retailer 8
-
£2,144 GBP
View
B+
Retailer 9
-
£2,167 GBP
View
B+
Retailer 10
-
£2,208 GBP
View
B
Retailer 11
-
£2,635 GBP
View
Most Expensive
B
Wholesale Diamonds Direct
636181062 · Nov 6
£2,808 GBP
$3,758 USD
View
11 more retailers have this diamond
Prices start from £1,600 GBPSave up to £1,207 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
1.29ct Round
£1,600 GBP