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Radiant|Lab Grown|IGI

3.18ct D IF Radiant Lab Grown Diamond

VG • D/IF • IGI LG828688643

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

Certificate IGI LG828688643

Diamond specifications and retailer prices

From $1,397 USD
As of October 28, 2026
Save $10,873 USD (89%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $12,270 USD at Brilliant Earth · As of October 28, 2026
View at Brilliant Earth

About this 3.18ct lab-grown radiant diamond

This 3.18ct lab-grown radiant sits in the three to five carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a very-good cut grade and certified by IGI LG828688643 or 828688643. Listed at 18 retailers as of October 28, 2026, with prices from $1,397 to $12,270, a $10,873 spread on the same certified stone. Brilliant Earth lists it at $12,270. 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

3.18
Carat
D
Color
IF
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.2°
Pavilion angle38.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG828688643
Dimensions10.11 × 7.21 × 5.01 mm
L/W Ratio1.40
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.11 mm7.21 mm3.18 ctD / IF
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG828688643
Side View
Table 70.0%Crown 43.2°Girdle: Slightly ThickPavilion 38.4°Culet: NoneDepth 69.5%

Caratlytics Score

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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 28
Current: $12,270 USD|Low: $1,397 USD|High: $12,270 USD|Avg: $3,876 USD
Brilliant Earth
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
Retailer 17
Retailer 18
October 29, 2026
Retailer 4$1,397 USD
Retailer 11$1,610 USD
Retailer 14$1,721 USD
Retailer 13$1,764 USD
Retailer 18$2,017 USD
Retailer 5$2,070 USD
Retailer 8$2,599 USD
Retailer 6$2,771 USD
Retailer 16$3,174 USD
Retailer 2$3,340 USD
Retailer 9$3,551 USD
Retailer 7$4,199 USD
Retailer 12$4,646 USD
Retailer 17$5,044 USD
Retailer 15$5,218 USD
Retailer 3$5,398 USD
Retailer 10$7,086 USD
Brilliant Earth$12,270 USD

23 data points across 18 retailers

18 retailers$1,397 USD to $12,270 USD

A
Cheapest Retailer
-
$1,397 USD
Final sale: no returns
A
Retailer 2
-
$1,610 USD
View
A
Retailer 3
-
$1,721 USD
£1,355 GBP
View
A
Retailer 4
-
$1,764 USD
View
A
Retailer 5
-
$2,017 USD
£1,588 GBP
View
A
Retailer 6
-
$2,070 USD
View
A
Retailer 7
-
$2,599 USD
€2,475 EUR
View
A
Retailer 8
-
$2,771 USD
View
A
Retailer 9
-
$3,174 USD
View
A
Retailer 10
-
$3,340 USD
ZAR 53,954 ZAR
View
B+
Retailer 11
-
$3,551 USD
£2,796 GBP
View
Price last confirmed 7 days ago
B+
Retailer 12
-
$4,199 USD
View
B+
Retailer 13
-
$4,646 USD
£3,658 GBP
View
B+
Retailer 14
-
$5,044 USD
View
B+
Retailer 15
-
$5,218 USD
View
B
Retailer 16
-
$5,398 USD
SGD 7,294 SGD
View
B
Retailer 17
-
$7,086 USD
A$10,901 AUD
View
Price last confirmed 20 days ago
Most Expensive
B
Brilliant Earth
21324580A · Oct 28
$12,270 USD
View
17 more retailers have this diamond
Prices start from $1,397 USDSave up to $10,873 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
3.18ct Radiant
$1,397 USD