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Radiant|Lab Grown|IGI

1.63ct D SI1 Radiant Lab Grown Diamond

VG • D/SI1 • IGI LG797641220

Certificate IGI LG797641220

Diamond specifications and retailer prices

From £852 GBP
$1,141 USD
As of October 31, 2026
Save £313 GBP (27%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £1,164 GBP at Zales · As of October 30, 2026
View at Zales

About this 1.63ct lab-grown radiant diamond

This 1.63ct lab-grown radiant sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG797641220 or 797641220. Listed at 4 retailers as of October 30, 2026, with prices from £852 to £1,164, a £313 spread on the same certified stone. Zales lists it at £1,164. 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

1.63
Carat
D
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabIGI
CertificateIGI LG797641220
Dimensions7.81 × 5.96 × 4.07 mm
L/W Ratio1.31
Top View
7.81 mm5.96 mm1.63 ctD / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG797641220
Side View
Table 66.0%CrownGirdle: MediumPavilionCulet: NoneDepth 68.3%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Oct 31
Current: £948 GBP|Low: £852 GBP|High: £1,567 GBP|Avg: £1,067 GBP|-39.5%
Retailer 1
Retailer 2
Retailer 3
Zales
October 1, 2026
Retailer 2£852 GBP
Retailer 1£948 GBP
Retailer 3£1,164 GBP
Zales£1,164 GBP

3 data points across 4 retailers

4 retailers£852 GBP to £1,164 GBP

B
Cheapest Retailer
-
£852 GBP
$1,141 USD
B
Retailer 2
-
£948 GBP
$1,270 USD
View
B
Retailer 3
-
£1,164 GBP
$1,560 USD
View
Most Expensive
B
Zales
528612164 · Oct 30
£1,164 GBP
$1,560 USD
View
3 more retailers have this diamond
Prices start from £852 GBPSave up to £313 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
1.63ct Radiant
£852 GBP