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Radiant|Lab Grown|IGI

0.81ct D SI1 Radiant Lab Grown Diamond

ID • D/SI1 • IGI LG648465420

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

Certificate IGI LG648465420

Diamond specifications and retailer prices

From $178 AUD
$125 USD
As of October 30, 2026
Save $571 AUD (76%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $749 AUD at Friendly Diamonds · As of October 31, 2026
View at Friendly Diamonds

About this 0.81ct lab-grown radiant diamond

This 0.81ct lab-grown radiant sits in the just-under-one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG648465420 or 648465420. Listed at 13 retailers as of October 30, 2026, with prices from $178 to $749, a $571 spread on the same certified stone. Friendly Diamonds lists it at $749. 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

0.81
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle46.8°
Pavilion angle35.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG648465420
Dimensions6.43 × 4.60 × 3.10 mm
L/W Ratio1.40
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.43 mm4.60 mm0.81 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG648465420
Side View
Table 67.0%Crown 46.8°Girdle: MED-STKPavilion 35.9°Culet: NoneDepth 67.4%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $749 AUD|Low: $178 AUD|High: $1,068 AUD|Avg: $464 AUD
Friendly Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
October 31, 2026
Retailer 10$178 AUD
Retailer 6$206 AUD
Retailer 12$235 AUD
Retailer 5$255 AUD
Retailer 11$320 AUD
Retailer 16$337 AUD
Retailer 9$363 AUD
Retailer 15$363 AUD
Retailer 2$395 AUD
Retailer 3$423 AUD
Retailer 4$454 AUD
Retailer 13$561 AUD
Retailer 14$709 AUD
Friendly Diamonds$749 AUD
Retailer 7$878 AUD
Retailer 8$1,068 AUD

4 data points across 16 retailers

13 retailers$178 AUD to $749 AUD

A
Cheapest Retailer
-
$178 AUD
$125 USD
A
Retailer 2
-
$206 AUD
$145 USD
View
A
Retailer 3
-
$235 AUD
$165 USD
View
A
Retailer 4
-
$255 AUD
HK$1,400 HKD
View
A
Retailer 5
-
$320 AUD
£177 GBP
View
A
Retailer 6
-
$337 AUD
$237 USD
View
A
Retailer 7
-
$363 AUD
£201 GBP
View
A
Retailer 8
-
$395 AUD
€264 EUR
View
B+
Retailer 9
-
$423 AUD
$297 USD
View
B+
Retailer 10
-
$454 AUD
£251 GBP
View
B+
Retailer 11
-
$561 AUD
$394 USD
View
B
Retailer 12
-
$709 AUD
$498 USD
View
Most Expensive
B
Friendly Diamonds
6558455 · Oct 31
$749 AUD
$526 USD
View
12 more retailers have this diamond
Prices start from $178 AUDSave up to $571 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.

A
0.81ct Radiant
$178 AUD