CaratHunter
Plans
Radiant|Lab Grown|IGI

0.99ct G SI1 Radiant Lab Grown Diamond

G/SI1 • IGI LG640433477

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG640433477

Diamond specifications and retailer prices

From £281 GBP
As of October 31, 2026
Save £59 GBP (17%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £340 GBP at MD Diamonds and Jewellers · As of October 29, 2026
View at MD Diamonds and Jewellers

About this 0.99ct lab-grown radiant diamond

This 0.99ct lab-grown radiant sits in the just-under-one-carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included) and certified by IGI LG640433477 or 640433477. Listed at 2 retailers as of October 29, 2026, with prices from £281 to £340, a £59 spread on the same certified stone. MD Diamonds and Jewellers lists it at £340. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

0.99
Carat
G
Colour
SI1
Clarity
-
Cut

Specifications

Cut
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle45.9°
Pavilion angle35.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG640433477
Dimensions7.17 × 4.86 × 3.34 mm
L/W Ratio1.48
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.17 mm4.86 mm0.99 ctG / SI1
OriginLab Grown
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG640433477
Side View
Table 63.0%Crown 45.9°Girdle: MediumPavilion 35.2°Culet: NoneDepth 68.7%

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: £340 GBP|Low: £340 GBP|High: £340 GBP|Avg: £340 GBP
December 30, 2025
MD Diamonds and Jewellers£340 GBP

3 data points across 1 retailer

2 retailers£281 GBP to £340 GBP

B+
Cheapest Retailer
-
£281 GBP
Most Expensive
B
MD Diamonds and Jewellers
LG640433477 · Oct 29
£340 GBP
View
1 more retailer has this diamond
Prices start from £281 GBPSave up to £59 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+
0.99ct Radiant
£281 GBP