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Round|Lab Grown|IGI

4.18ct D IF Round Lab Grown Diamond

ID • D/IF • IGI LG683520148

Shape and cutting style on the report: Round brilliant

Certificate IGI LG683520148

Diamond specifications and retailer prices

From $1,849 USD
£1,456 GBP
As of October 29, 2026
Save $13,961 USD (88%) vs most expensive(unlock to see where)
28 retailers carry this diamond
Most expensive: $15,810 USD at Brilliant Earth · As of October 24, 2026
View at Brilliant Earth

About this 4.18ct lab-grown round diamond

This 4.18ct lab-grown round 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 LG683520148 or 683520148. Listed at 28 retailers as of October 24, 2026, with prices from $1,849 to $15,810, a $13,961 spread on the same certified stone. Brilliant Earth lists it at $15,810. 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

4.18
Carat
D
Color
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.6°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG683520148
Dimensions10.53 × 10.48 × 6.25 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
HEARTS & ARROWS As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
10.53 mm10.48 mm4.18 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG683520148
Side View
Table 58.0%Crown 33.6°Girdle: MediumPavilion 40.4°Culet: NoneDepth 59.5%

Caratlytics Score

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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 29
Current: $15,810 USD|Low: $1,838 USD|High: $15,810 USD|Avg: $4,736 USD
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
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Retailer 10
Retailer 11
Retailer 12
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Retailer 17
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Retailer 19
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Retailer 22
October 29, 2026
Retailer 13$1,849 USD
Retailer 14$2,049 USD
Retailer 5$2,079 USD
Retailer 7$2,153 USD
Retailer 15$2,229 USD
Retailer 20$2,378 USD
Retailer 18$2,380 USD
Retailer 4$2,816 USD
Retailer 17$3,243 USD
Retailer 19$3,375 USD
Retailer 3$3,578 USD
Retailer 22$3,622 USD
Retailer 2$4,654 USD
Retailer 11$5,040 USD
Retailer 12$5,101 USD
Retailer 9$5,802 USD
Retailer 16$6,050 USD
Retailer 8$6,105 USD
Retailer 6$6,797 USD
Retailer 10$8,148 USD
Retailer 21$12,770 USD
Brilliant Earth$15,810 USD

28 data points across 22 retailers

28 retailers$1,849 USD to $15,810 USD

A+
Cheapest Retailer
-
$1,849 USD
£1,456 GBP
A
Retailer 2
-
$2,049 USD
View
A
Retailer 3
-
$2,079 USD
View
Final sale: no returns
A
Retailer 4
-
$2,153 USD
View
A
Retailer 5
-
$2,229 USD
View
Price last confirmed 9 days ago
A
Retailer 6
-
$2,377 USD
View
Price last confirmed 18 days ago
A
Retailer 7
-
$2,378 USD
View
A
Retailer 8
-
$2,380 USD
View
A
Retailer 9
-
$2,816 USD
HK$22,000 HKD
View
A
Retailer 10
-
$3,243 USD
£2,553 GBP
View
A
Retailer 11
-
$3,267 USD
View
Price last confirmed 7 days ago
A
Retailer 12
-
$3,375 USD
View
A
Retailer 13
-
$3,578 USD
View
A
Retailer 14
-
$3,622 USD
View
A
Retailer 15
-
$4,654 USD
€4,432 EUR
View
A
Retailer 16
-
$5,040 USD
ZAR 81,414 ZAR
View
A
Retailer 17
-
$5,101 USD
A$7,847 AUD
View
A
Retailer 18
-
$5,802 USD
View
B+
Retailer 19
-
$6,050 USD
View
A
Retailer 20
-
$6,105 USD
View
B+
Retailer 21
-
$6,687 USD
View
B+
Retailer 22
-
$6,797 USD
£5,352 GBP
View
B+
Retailer 23
-
$8,148 USD
SGD 11,011 SGD
View
B+
Retailer 24
-
$8,315 USD
View
B+
Retailer 25
-
$9,423 USD
£7,420 GBP
View
Price last confirmed 19 days ago
B
Retailer 26
-
$12,770 USD
View
B
Retailer 27
-
$15,720 USD
View
Most Expensive
B
Brilliant Earth
13152316A · Oct 24
$15,810 USD
View
27 more retailers have this diamond
Prices start from $1,849 USDSave up to $13,961 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+
4.18ct Round
$1,849 USD