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Round|Natural|GIA

1.29ct F SI1 Round Natural Diamond

EX • F/SI1 • GIA 1246023151

Certificate GIA 1246023151

Diamond specifications and retailer prices

From £3,154 GBP
$4,233 USD
As of October 29, 2026
Save £2,214 GBP (41%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £5,693 GBP at Wholesale Diamonds Direct · As of October 26, 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 F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1246023151. Listed at 11 retailers as of October 29, 2026, with a 70% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
F
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 1246023151
Dimensions6.90 × 4.35 × 4.35 mm
L/W Ratio1.59
Culet sizeNone
Top View
6.90 mm4.35 mm1.29 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1246023151
Side View
Table 56.0%Crown 36.5°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 62.7%

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: Oct 29
Current: £4,145 GBP|Low: £3,154 GBP|High: £5,979 GBP|Avg: £4,180 GBP|-3.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Wholesale Diamonds Direct
October 30, 2026
Retailer 7£3,154 GBP
Retailer 9£3,243 GBP
Retailer 6£3,372 GBP
Retailer 2£3,475 GBP
Retailer 4£3,600 GBP
Retailer 10£4,008 GBP
Retailer 3£4,127 GBP
Retailer 1£4,145 GBP
Retailer 5£4,417 GBP
Retailer 8£5,368 GBP
Wholesale Diamonds Direct£5,693 GBP

32 data points across 11 retailers

11 retailers£3,154 GBP to £5,368 GBP

A
Cheapest Retailer
-
£3,154 GBP
$4,233 USD
A
Retailer 2
-
£3,243 GBP
SGD 5,881 SGD
View
A
Retailer 3
-
£3,372 GBP
$4,525 USD
View
A
Retailer 4
-
£3,475 GBP
SGD 6,301 SGD
View
B+
Retailer 5
-
£3,600 GBP
View
B+
Retailer 6
-
£4,008 GBP
$5,379 USD
View
B+
Retailer 7
-
£4,127 GBP
€5,274 EUR
View
B+
Retailer 8
-
£4,145 GBP
View
B+
Retailer 9
-
£4,417 GBP
$5,927 USD
View
B
Retailer 10
-
£5,368 GBP
$7,204 USD
View
Most Expensive
Wholesale Diamonds Direct
594396961 · Oct 26
£5,693 GBP
$7,640 USD
View
Price last confirmed 7 days ago
10 more retailers have this diamond
Prices start from £3,154 GBPSave up to £2,214 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
£3,154 GBP