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Round|Lab Grown|IGI

3.55ct D IF Round Lab Grown Diamond

ID • D/IF • IGI LG747508545

Certificate IGI LG747508545

Diamond specifications and retailer prices

From $1,120 USD
Save $11,200 USD (91%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $12,320 USD at Brilliant Earth
View at Brilliant Earth

About this 3.55ct lab-grown round diamond

This 3.55ct 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 LG747508545 or 747508545. Listed at 19 retailers, with prices from $1,120 to $12,320 at Brilliant Earth, a $11,200 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

3.55
Carat
D
Color
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG747508545
Dimensions9.87 × 9.84 × 5.97 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
9.87 mm9.84 mm3.55 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG747508545
Side View
Table 58.0%Crown 34°Girdle: MediumPavilion 40.7°Culet: NoneDepth 60.5%

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 28
Current: $12,320 USD|Low: $906 USD|High: $19,280 USD|Avg: $4,189 USD|-36.1%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
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Retailer 19
October 1, 2026
Retailer 4$1,120 USD
Retailer 7$1,219 USD
Retailer 11$1,268 USD
Retailer 14$1,475 USD
Retailer 6$1,485 USD
Retailer 8$1,718 USD
Retailer 12$1,722 USD
Retailer 9$2,204 USD
Retailer 2$2,238 USD
Retailer 10$2,635 USD
Retailer 19$2,688 USD
Retailer 18$3,089 USD
Retailer 16$3,242 USD
Retailer 15$4,663 USD
Retailer 17$5,485 USD
Retailer 13$6,120 USD
Retailer 5$9,950 USD
Retailer 3$10,953 USD
Brilliant Earth$12,320 USD

23 data points across 19 retailers

19 retailers$1,120 USD to $12,320 USD

A
Cheapest Retailer
-
$1,120 USD
A
Retailer 2
-
$1,219 USD
View
Price last confirmed 7 days ago
A
Retailer 3
-
$1,268 USD
View
A
Retailer 4
-
$1,475 USD
View
A
Retailer 5
-
$1,485 USD
View
A
Retailer 6
-
$1,718 USD
View
A
Retailer 7
-
$1,722 USD
£1,356 GBP
View
A
Retailer 8
-
$2,204 USD
View
A
Retailer 9
-
$2,238 USD
€2,131 EUR
View
A
Retailer 10
-
$2,635 USD
View
A
Retailer 11
-
$2,688 USD
View
A
Retailer 12
-
$3,089 USD
View
A
Retailer 13
-
$3,242 USD
A$4,988 AUD
View
B+
Retailer 14
-
$4,663 USD
£3,672 GBP
View
B+
Retailer 15
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$5,485 USD
View
B+
Retailer 16
-
$6,120 USD
A$9,416 AUD
View
B
Retailer 17
-
$9,950 USD
View
B
Retailer 18
-
$10,953 USD
View
Most Expensive
B
Brilliant Earth
16778718Y · Oct 1
$12,320 USD
View
18 more retailers have this diamond
Prices start from $1,120 USDSave up to $11,200 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
3.55ct Round
$1,120 USD