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Round|Lab Grown|IGI

4.51ct D IF Round Lab Grown Diamond

ID • D/IF • IGI LG660448727

Certificate IGI LG660448727

Diamond specifications and retailer prices

From $2,952 USD
£2,324 GBP
Save $24,688 USD (89%) vs most expensive(unlock to see where)
25 retailers carry this diamond
Most expensive: $27,640 USD at Brilliant Earth
View at Brilliant Earth

About this 4.51ct lab-grown round diamond

This 4.51ct 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 LG660448727 or 660448727. Listed at 25 retailers, with prices from $2,952 to $27,640 at Brilliant Earth, a $24,688 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

4.51
Carat
D
Color
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.7°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG660448727
Dimensions10.60 × 10.53 × 6.55 mm
L/W Ratio1.01
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
10.60 mm10.53 mm4.51 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG660448727
Side View
Table 57.0%Crown 35.7°Girdle: MediumPavilion 40.7°Culet: NoneDepth 62.0%

Caratlytics Score

How it works →
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: Oct 1
Current: $27,640 USD|Low: $2,952 USD|High: $27,640 USD|Avg: $10,183 USD
Brilliant Earth
Retailer 2
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Retailer 21
October 1, 2026
Retailer 2$2,952 USD
Retailer 18$3,307 USD
Retailer 15$3,426 USD
Retailer 13$3,466 USD
Retailer 9$4,480 USD
Retailer 11$4,552 USD
Retailer 10$4,555 USD
Retailer 20$5,016 USD
Retailer 19$5,136 USD
Retailer 8$5,201 USD
Retailer 14$6,957 USD
Retailer 3$7,901 USD
Retailer 4$8,147 USD
Retailer 6$9,297 USD
Retailer 17$9,432 USD
Retailer 5$9,700 USD
Retailer 12$10,719 USD
Retailer 21$12,959 USD
Retailer 7$13,237 USD
Retailer 16$20,320 USD
Brilliant Earth$27,640 USD

39 data points across 21 retailers

25 retailers$2,952 USD to $27,640 USD

Cheapest Retailer
-
$2,952 USD
£2,324 GBP
Retailer 2
-
$2,953 USD
View
A
Retailer 3
-
$3,307 USD
View
Retailer 4
-
$3,378 USD
View
A
Retailer 5
-
$3,426 USD
View
A
Retailer 6
-
$3,466 USD
View
A
Retailer 7
-
$4,480 USD
HK$35,000 HKD
View
A
Retailer 8
-
$4,552 USD
View
A
Retailer 9
-
$4,555 USD
View
Retailer 10
-
$4,725 USD
View
A
Retailer 11
-
$5,027 USD
£3,958 GBP
View
A
Retailer 12
-
$5,136 USD
View
A
Retailer 13
-
$5,201 USD
View
A
Retailer 14
-
$6,957 USD
View
Price last confirmed 59 days ago
B+
Retailer 15
-
$7,901 USD
ZAR 127,634 ZAR
View
B+
Retailer 16
-
$8,147 USD
A$12,534 AUD
View
B+
Retailer 17
-
$9,297 USD
View
B+
Retailer 18
-
$9,432 USD
View
B+
Retailer 19
-
$9,700 USD
£7,638 GBP
View
B+
Retailer 20
-
$10,253 USD
View
B+
Retailer 21
-
$10,719 USD
£8,440 GBP
View
B+
Retailer 22
-
$12,959 USD
SGD 17,512 SGD
View
B+
Retailer 23
-
$13,237 USD
View
B
Retailer 24
-
$20,320 USD
View
Most Expensive
B
Brilliant Earth
20152192Y · Sep 29
$27,640 USD
View
24 more retailers have this diamond
Prices start from $2,952 USDSave up to $24,688 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
4.51ct Round
$2,952 USD