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Round|Lab Grown|IGI

4.51ct G IF Round Lab Grown Diamond

ID • G/IF • IGI LG626473310

Shape and cutting style on the report: Round brilliant

Certificate IGI LG626473310

Diamond specifications and retailer prices

From $2,581 USD
As of October 29, 2026
Save $7,860 USD (75%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $10,441 USD at Taylor and Hart · As of October 31, 2026
View at Taylor and Hart

About this 4.51ct lab-grown round diamond

This 4.51ct lab-grown round sits in the three to five carat band, graded G colour (near-colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG626473310 or 626473310. Listed at 21 retailers as of October 29, 2026, with prices from $2,581 to $10,441, a $7,860 spread on the same certified stone. Taylor and Hart lists it at $10,441. 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
G
Color
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.1°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG626473310
Dimensions10.59 × 10.66 × 6.50 mm
L/W Ratio1.01
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
10.59 mm10.66 mm4.51 ctG / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG626473310
Side View
Table 57.0%Crown 34.1°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 61.2%

Caratlytics Score

How it works →
A
Excellent
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: $4,925 USD|Low: $2,477 USD|High: $13,820 USD|Avg: $5,032 USD|+6.2%
Retailer 1
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
November 1, 2026
Retailer 2$2,581 USD
Retailer 7$2,808 USD
Retailer 5$2,890 USD
Retailer 4$2,993 USD
Retailer 15$2,995 USD
Retailer 6$3,155 USD
Retailer 10$3,993 USD
Retailer 8$4,115 USD
Retailer 16$4,392 USD
Retailer 11$4,747 USD
Retailer 1$4,925 USD
Retailer 13$6,372 USD
Retailer 9$6,413 USD
Retailer 3$7,605 USD
Retailer 12$8,020 USD
Retailer 14$8,058 USD

42 data points across 16 retailers

21 retailers$2,581 USD to $10,441 USD

A
Cheapest Retailer
-
$2,581 USD
A
Retailer 2
-
$2,808 USD
View
A
Retailer 3
-
$2,890 USD
View
Final sale: no returns
A
Retailer 4
-
$2,993 USD
View
Retailer 5
-
$2,993 USD
View
Price last confirmed 20 days ago
A
Retailer 6
-
$2,995 USD
View
A
Retailer 7
-
$3,155 USD
View
A
Retailer 8
-
$3,993 USD
£3,144 GBP
View
A
Retailer 9
-
$4,115 USD
View
B+
Retailer 10
-
$4,392 USD
View
B+
Retailer 11
-
$4,747 USD
€4,521 EUR
View
A
Retailer 12
-
$4,925 USD
View
B+
Retailer 13
-
$5,319 USD
View
B+
Retailer 14
-
$6,372 USD
ZAR 102,939 ZAR
View
B+
Retailer 15
-
$6,413 USD
A$9,866 AUD
View
B
Retailer 16
-
$7,605 USD
View
B
Retailer 17
-
$7,992 USD
View
B+
Retailer 18
-
$8,020 USD
View
B+
Retailer 19
-
$8,058 USD
£6,345 GBP
View
B
Retailer 20
-
$8,582 USD
View
Most Expensive
B
Taylor and Hart
WQO5GBO · Oct 31
$10,441 USD
View
20 more retailers have this diamond
Prices start from $2,581 USDSave up to $7,860 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. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
4.51ct Round
$2,581 USD