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Heart|Lab Grown|IGI

3.18ct D FL Heart Lab Grown Diamond

ID • D/FL • IGI LG787614458

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG787614458

Diamond specifications and retailer prices

From $11,479 USD
As of October 30, 2026
Save $11,816 USD (51%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $30,919 USD at Cape Diamonds · As of October 29, 2026
View at Cape Diamonds

About this 3.18ct lab-grown heart diamond

This 3.18ct lab-grown heart sits in the three to five carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG787614458 or 787614458. Listed at 19 retailers as of October 30, 2026, with a 103% 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
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.9°
Pavilion angle39.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG787614458
Dimensions10.20 × 8.53 × 6.06 mm
L/W Ratio1.20
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.20 mm8.53 mm3.18 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG787614458
Side View
Table 63.0%Crown 37.9°Girdle: STK-THKPavilion 39.9°Culet: NoneDepth 59.4%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $30,919 USD|Low: $8,239 USD|High: $51,591 USD|Avg: $20,883 USD|-7.3%
Cape 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
Retailer 17
October 29, 2026
Retailer 9$8,239 USD
Retailer 6$11,479 USD
Retailer 12$11,938 USD
Retailer 15$12,275 USD
Retailer 11$12,276 USD
Retailer 7$12,479 USD
Retailer 4$12,856 USD
Retailer 14$13,212 USD
Retailer 16$13,315 USD
Retailer 10$15,730 USD
Retailer 13$16,357 USD
Retailer 2$20,550 USD
Retailer 8$24,517 USD
Cape Diamonds$30,919 USD
Retailer 17$38,917 USD
Retailer 3$39,173 USD
Retailer 5$46,949 USD

35 data points across 17 retailers

19 retailers$11,479 USD to $23,295 USD

B+
Cheapest Retailer
-
$11,479 USD
B+
Retailer 2
-
$11,938 USD
View
B+
Retailer 3
-
$12,275 USD
View
B+
Retailer 4
-
$12,276 USD
View
B+
Retailer 5
-
$12,479 USD
View
B
Retailer 6
-
$12,856 USD
View
Final sale: no returns
B+
Retailer 7
-
$13,212 USD
View
B+
Retailer 8
-
$13,315 USD
View
Retailer 9
-
$13,315 USD
View
Price last confirmed 15 days ago
Retailer 10
-
$14,222 USD
View
Price last confirmed 15 days ago
B
Retailer 11
-
$15,730 USD
View
Retailer 12
-
$16,357 USD
£12,880 GBP
View
Price last confirmed 11 days ago
B
Retailer 13
-
$20,550 USD
£16,181 GBP
View
B
Retailer 14
-
$23,295 USD
View
Retailer 15
-
$24,517 USD
View
Price under review
Most Expensive
Cape Diamonds
cert_787614458 · Oct 29
$30,919 USD
ZAR 499,505 ZAR
View
Price under review
15 more retailers have this diamond
Prices start from $11,479 USDSave up to $11,816 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.

B+
3.18ct Heart
$11,479 USD