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Radiant|Lab Grown|IGI

3.18ct D IF Radiant Lab Grown Diamond

ID • D/IF • IGI LG719530985

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

Certificate IGI LG719530985

Diamond specifications and retailer prices

From $1,228 USD
As of October 30, 2026
Save $3,938 USD (76%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: $12,260 USD at Brilliant Earth · As of October 18, 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 top-tier cut grade and certified by IGI LG719530985 or 719530985. Listed at 23 retailers as of October 30, 2026, with a 321% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

3.18
Carat
D
Color
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40.2°
Pavilion angle32.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG719530985
Dimensions10.92 × 7.29 × 4.61 mm
L/W Ratio1.50
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.92 mm7.29 mm3.18 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG719530985
Side View
Table 65.0%Crown 40.2°Girdle: MED-STKPavilion 32.4°Culet: NoneDepth 63.2%

Caratlytics Score

How it works →
A+
Exceptional
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: $12,260 USD|Low: $1,228 USD|High: $12,260 USD|Avg: $3,478 USD
Brilliant Earth
Retailer 2
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Retailer 22
October 30, 2026
Retailer 12$1,228 USD
Retailer 11$1,336 USD
Retailer 6$1,424 USD
Retailer 17$1,595 USD
Retailer 9$1,676 USD
Retailer 21$1,784 USD
Retailer 16$2,038 USD
Retailer 2$2,063 USD
Retailer 19$2,264 USD
Retailer 3$2,670 USD
Retailer 10$2,729 USD
Retailer 4$3,172 USD
Retailer 22$3,222 USD
Retailer 13$3,307 USD
Retailer 8$3,444 USD
Retailer 20$3,946 USD
Retailer 18$4,582 USD
Retailer 7$4,994 USD
Retailer 5$5,166 USD
Retailer 15$5,890 USD
Retailer 14$7,086 USD
Brilliant Earth$12,260 USD

31 data points across 22 retailers

23 retailers$1,228 USD to $5,166 USD

A+
Cheapest Retailer
-
$1,228 USD
A
Retailer 2
-
$1,336 USD
View
A
Retailer 3
-
$1,424 USD
View
A
Retailer 4
-
$1,595 USD
View
A
Retailer 5
-
$1,676 USD
View
Retailer 6
-
$1,703 USD
View
Price last confirmed 17 days ago
A
Retailer 7
-
$1,784 USD
View
Final sale: no returns
A
Retailer 8
-
$2,038 USD
View
A
Retailer 9
-
$2,063 USD
£1,624 GBP
View
Retailer 10
-
$2,264 USD
€2,156 EUR
View
Price last confirmed 7 days ago
A
Retailer 11
-
$2,670 USD
View
A
Retailer 12
-
$2,729 USD
View
A
Retailer 13
-
$3,172 USD
View
Retailer 14
-
$3,222 USD
A$4,957 AUD
View
Price last confirmed 8 days ago
A
Retailer 15
-
$3,307 USD
ZAR 53,432 ZAR
View
A
Retailer 16
-
$3,444 USD
£2,712 GBP
View
B+
Retailer 17
-
$3,946 USD
View
B+
Retailer 18
-
$4,582 USD
£3,608 GBP
View
B+
Retailer 19
-
$4,994 USD
View
B+
Retailer 20
-
$5,166 USD
View
Retailer 21
-
$5,890 USD
View
Price last confirmed 25 days ago
Retailer 22
-
$7,086 USD
A$10,901 AUD
View
Price last confirmed 21 days ago
Most Expensive
Brilliant Earth
20114891A · Oct 18
$12,260 USD
View
Price last confirmed 11 days ago
22 more retailers have this diamond
Prices start from $1,228 USDSave up to $3,938 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
$1,228 USD