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 $125 USD
As of October 30, 2026
Save $401 USD (76%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $526 USD 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 12 retailers as of October 30, 2026, with prices from $125 to $526, a $401 spread on the same certified stone. Friendly Diamonds lists it at $526. 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
Color
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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $526 USD|Low: $125 USD|High: $750 USD|Avg: $325 USD
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 2$125 USD
Retailer 5$145 USD
Retailer 11$165 USD
Retailer 4$179 USD
Retailer 9$225 USD
Retailer 15$237 USD
Retailer 6$237 USD
Retailer 14$255 USD
Retailer 10$257 USD
Retailer 16$297 USD
Retailer 3$319 USD
Retailer 12$394 USD
Retailer 13$498 USD
Friendly Diamonds$526 USD
Retailer 7$616 USD
Retailer 8$750 USD

4 data points across 16 retailers

12 retailers$125 USD to $526 USD

A
Cheapest Retailer
-
$125 USD
A
Retailer 2
-
$145 USD
View
A
Retailer 3
-
$165 USD
View
A
Retailer 4
-
$179 USD
HK$1,400 HKD
View
A
Retailer 5
-
$225 USD
£177 GBP
View
A
Retailer 6
-
$237 USD
View
A
Retailer 7
-
$257 USD
£202 GBP
View
B+
Retailer 8
-
$297 USD
View
B+
Retailer 9
-
$319 USD
£251 GBP
View
B+
Retailer 10
-
$394 USD
View
B
Retailer 11
-
$498 USD
View
Most Expensive
B
Friendly Diamonds
6558455 · Oct 31
$526 USD
View
11 more retailers have this diamond
Prices start from $125 USDSave up to $401 USD

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
$125 USD