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Round|Lab Grown|IGI

4.51ct D IF Round Lab Grown Diamond

ID • D/IF • IGI LG754595249

Certificate IGI LG754595249

Diamond specifications and retailer prices

From $3,780 USD
Save $23,860 USD (86%) vs most expensive(unlock to see where)
21 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 LG754595249 or 754595249. Listed at 21 retailers, with prices from $3,780 to $27,640 at Brilliant Earth, a $23,860 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 angle34.1°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG754595249
Dimensions10.65 × 10.69 × 6.50 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
10.65 mm10.69 mm4.51 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG754595249
Side View
Table 58.0%Crown 34.1°Girdle: MediumPavilion 40.8°Culet: NoneDepth 60.9%

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: Sep 30
Current: $27,640 USD|Low: $2,644 USD|High: $27,640 USD|Avg: $7,897 USD
Brilliant Earth
Retailer 2
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Retailer 21
October 1, 2026
Retailer 21$3,780 USD
Retailer 3$4,301 USD
Retailer 10$4,650 USD
Retailer 9$4,710 USD
Retailer 16$5,094 USD
Retailer 7$5,512 USD
Retailer 15$5,515 USD
Retailer 5$5,817 USD
Retailer 2$6,065 USD
Retailer 8$7,032 USD
Retailer 14$7,147 USD
Retailer 17$8,016 USD
Retailer 18$8,273 USD
Retailer 19$9,841 USD
Retailer 4$10,421 USD
Retailer 11$10,644 USD
Retailer 13$12,405 USD
Retailer 12$13,444 USD
Retailer 20$13,645 USD
Retailer 6$14,647 USD
Brilliant Earth$27,640 USD

40 data points across 21 retailers

21 retailers$3,780 USD to $27,640 USD

A
Cheapest Retailer
-
$3,780 USD
A
Retailer 2
-
$4,301 USD
View
A
Retailer 3
-
$4,650 USD
View
A
Retailer 4
-
$4,710 USD
HK$36,800 HKD
View
A
Retailer 5
-
$5,105 USD
£4,020 GBP
View
A
Retailer 6
-
$5,512 USD
View
A
Retailer 7
-
$5,515 USD
View
A
Retailer 8
-
$5,817 USD
View
A
Retailer 9
-
$6,065 USD
€5,776 EUR
View
A
Retailer 10
-
$7,032 USD
A$10,818 AUD
View
A
Retailer 11
-
$7,147 USD
View
Price last confirmed 52 days ago
B+
Retailer 12
-
$8,016 USD
ZAR 129,501 ZAR
View
B+
Retailer 13
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$8,273 USD
A$12,728 AUD
View
B+
Retailer 14
-
$9,841 USD
£7,749 GBP
View
B+
Retailer 15
-
$10,421 USD
View
B+
Retailer 16
-
$10,644 USD
View
B+
Retailer 17
-
$12,405 USD
A$19,085 AUD
View
B+
Retailer 18
-
$13,444 USD
View
B+
Retailer 19
-
$13,645 USD
SGD 18,439 SGD
View
B
Retailer 20
-
$14,946 USD
View
Most Expensive
B
Brilliant Earth
18146716A · Sep 29
$27,640 USD
View
20 more retailers have this diamond
Prices start from $3,780 USDSave up to $23,860 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
$3,780 USD