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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 $1,624 AUD
$1,141 USD
As of October 31, 2026
Save $596 AUD (27%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $2,221 AUD 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 $1,624 to $2,221, a $596 spread on the same certified stone. Zales lists it at $2,221. 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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: $1,808 AUD|Low: $1,624 AUD|High: $2,990 AUD|Avg: $2,036 AUD|-39.5%
Retailer 1
Retailer 2
Retailer 3
Zales
October 1, 2026
Retailer 2$1,624 AUD
Retailer 1$1,808 AUD
Retailer 3$2,221 AUD
Zales$2,221 AUD

3 data points across 4 retailers

4 retailers$1,624 AUD to $2,221 AUD

B
Cheapest Retailer
-
$1,624 AUD
$1,141 USD
B
Retailer 2
-
$1,808 AUD
$1,270 USD
View
B
Retailer 3
-
$2,221 AUD
$1,560 USD
View
Most Expensive
B
Zales
528612164 · Oct 30
$2,221 AUD
$1,560 USD
View
3 more retailers have this diamond
Prices start from $1,624 AUDSave up to $596 AUD

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
$1,624 AUD