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Round|Lab Grown|IGI

4.05ct D IF Round Lab Grown Diamond

ID • D/IF • IGI LG729550897

Certificate IGI LG729550897

Diamond specifications and retailer prices

From $2,504 USD
Save $20,936 USD (89%) vs most expensive(unlock to see where)
25 retailers carry this diamond
Most expensive: $23,440 USD at Brilliant Earth
View at Brilliant Earth

About this 4.05ct lab-grown round diamond

This 4.05ct 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 LG729550897 or 729550897. Listed at 25 retailers, with prices from $2,504 to $23,440 at Brilliant Earth, a $20,936 spread on the same certified stone. 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

4.05
Carat
D
Color
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.4°
Pavilion angle41.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG729550897
Dimensions10.31 × 10.26 × 6.33 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
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
10.31 mm10.26 mm4.05 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG729550897
Side View
Table 57.0%Crown 33.4°Girdle: MediumPavilion 41.4°Culet: NoneDepth 61.5%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0-100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Sep 28
Current: $23,440 USD|Low: $2,001 USD|High: $23,490 USD|Avg: $6,563 USD|-0.2%
Brilliant Earth
Retailer 2
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Retailer 23
October 1, 2026
Retailer 4$2,504 USD
Retailer 23$2,724 USD
Retailer 7$2,803 USD
Retailer 8$2,864 USD
Retailer 10$2,904 USD
Retailer 22$3,056 USD
Retailer 9$3,760 USD
Retailer 18$3,908 USD
Retailer 6$3,992 USD
Retailer 3$4,059 USD
Retailer 17$4,150 USD
Retailer 2$4,536 USD
Retailer 12$4,593 USD
Retailer 11$4,952 USD
Retailer 19$6,069 USD
Retailer 21$6,228 USD
Retailer 20$7,869 USD
Retailer 5$7,971 USD
Retailer 14$8,147 USD
Retailer 15$10,133 USD
Retailer 16$10,445 USD
Retailer 13$10,725 USD
Brilliant Earth$23,440 USD

38 data points across 23 retailers

25 retailers$2,504 USD to $23,440 USD

A
Cheapest Retailer
-
$2,504 USD
A
Retailer 2
-
$2,724 USD
View
Price last confirmed 7 days ago
A
Retailer 3
-
$2,803 USD
View
A
Retailer 4
-
$2,864 USD
View
A
Retailer 5
-
$2,904 USD
View
A
Retailer 6
-
$3,056 USD
View
A
Retailer 7
-
$3,760 USD
View
A
Retailer 8
-
$3,917 USD
£3,084 GBP
View
A
Retailer 9
-
$3,992 USD
View
A
Retailer 10
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$4,059 USD
View
A
Retailer 11
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$4,150 USD
View
A
Retailer 12
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$4,451 USD
View
Price last confirmed 15 days ago
A
Retailer 13
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$4,536 USD
€4,320 EUR
View
A
Retailer 14
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$4,593 USD
View
A
Retailer 15
-
$4,952 USD
A$7,618 AUD
View
A
Retailer 16
-
$6,069 USD
ZAR 98,053 ZAR
View
A
Retailer 17
-
$6,228 USD
A$9,582 AUD
View
B+
Retailer 18
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$7,869 USD
£6,196 GBP
View
B+
Retailer 19
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$7,971 USD
View
B+
Retailer 20
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$8,147 USD
View
B+
Retailer 21
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$8,379 USD
View
B+
Retailer 22
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$10,133 USD
View
B+
Retailer 23
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$10,658 USD
View
B+
Retailer 24
-
$10,725 USD
A$16,500 AUD
View
Most Expensive
B
Brilliant Earth
16325271A · Sep 29
$23,440 USD
View
24 more retailers have this diamond
Prices start from $2,504 USDSave up to $20,936 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.

A
4.05ct Round
$2,504 USD