CaratHunter
Plans
Round|Lab Grown|IGI

1.29ct F SI1 Round Lab Grown Diamond

EX • F/SI1 • IGI LG854634719

Certificate IGI LG854634719

Diamond specifications and retailer prices

From £172 GBP
As of November 6, 2026
Save £336 GBP (66%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £508 GBP at Taylor and Hart · As of November 6, 2026
View at Taylor and Hart

About this 1.29ct lab-grown round diamond

This 1.29ct lab-grown 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 IGI LG854634719 or 854634719. Listed at 6 retailers as of November 6, 2026, with prices from £172 to £508, a £336 spread on the same certified stone. Taylor and Hart lists it at £508. 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
OriginLab Grown
Grading LabIGI
CertificateIGI LG854634719
Dimensions6.91 × 6.93 × 4.28 mm
L/W Ratio1.00
Top View
6.91 mm6.93 mm1.29 ctF / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG854634719
Side View
Table 58.0%CrownGirdle: MediumPavilionCulet: NoneDepth 61.8%

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 6
Current: £172 GBP|Low: £172 GBP|High: £508 GBP|Avg: £311 GBP
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Taylor and Hart
November 6, 2026
Retailer 1£172 GBP
Retailer 4£196 GBP
Retailer 5£251 GBP
Retailer 2£253 GBP
Retailer 3£486 GBP
Taylor and Hart£508 GBP

1 data point across 6 retailers

6 retailers£172 GBP to £508 GBP

A
Cheapest Retailer
-
£172 GBP
B+
Retailer 2
-
£196 GBP
View
A
Retailer 3
-
£251 GBP
View
A
Retailer 4
-
£253 GBP
View
B+
Retailer 5
-
£486 GBP
View
Most Expensive
B
Taylor and Hart
4387DGU · Nov 6
£508 GBP
$679 USD
View
5 more retailers have this diamond
Prices start from £172 GBPSave up to £336 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
£172 GBP