Radiant|Lab Grown|IGI

1.55ct D IF Radiant Lab Grown Diamond

EX • D/IF • IGI LG771654552

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG771654552

Diamond specifications and retailer prices

From $282 USD
As of November 4, 2026
Save $2,628 USD (90%) vs most expensive(unlock to see where)
27 retailers carry this diamond
Most expensive: $2,910 USD at Brilliant Earth · As of November 4, 2026
View at Brilliant Earth

About this 1.55ct lab-grown radiant diamond

This 1.55ct lab-grown radiant sits in the one-and-a-half to two carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG771654552 or 771654552. Listed at 27 retailers as of November 4, 2026, with prices from $282 to $2,910, a $2,628 spread on the same certified stone. Brilliant Earth lists it at $2,910. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.55
Carat
D
Color
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40.8°
Pavilion angle34.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG771654552
Dimensions8.52 × 5.85 × 3.76 mm
L/W Ratio1.46
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
8.52 mm5.85 mm1.55 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG771654552
Side View
Table 65.0%Crown 40.8°Girdle: MediumPavilion 34.4°Culet: NoneDepth 64.3%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 4
Current: $2,910 USD|Low: $282 USD|High: $2,910 USD|Avg: $990 USD
Brilliant Earth
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Retailer 24
November 5, 2026
Retailer 4$282 USD
Retailer 12$315 USD
Retailer 23$328 USD
Retailer 7$350 USD
Retailer 14$350 USD
Retailer 13$407 USD
Retailer 16$499 USD
Retailer 22$510 USD
Retailer 21$512 USD
Retailer 6$613 USD
Retailer 20$666 USD
Retailer 2$681 USD
Retailer 3$824 USD
Retailer 18$908 USD
Retailer 5$1,243 USD
Retailer 10$1,346 USD
Retailer 17$1,405 USD
Retailer 15$1,442 USD
Retailer 9$1,453 USD
Retailer 11$1,508 USD
Retailer 19$1,549 USD
Retailer 24$2,460 USD
Retailer 8$2,510 USD
Brilliant Earth$2,910 USD

30 data points across 24 retailers

27 retailers$282 USD to $2,910 USD

A
Cheapest Retailer
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$282 USD
A
Retailer 2
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$315 USD
View
Final sale: no returns
A
Retailer 3
-
$328 USD
View
Retailer 4
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$350 USD
View
Price last confirmed 11 days ago
A
Retailer 5
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$350 USD
View
A
Retailer 6
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$407 USD
View
A
Retailer 7
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$499 USD
View
A
Retailer 8
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$510 USD
View
A
Retailer 9
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$512 USD
View
A
Retailer 10
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$613 USD
View
A
Retailer 11
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$666 USD
View
A
Retailer 12
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$681 USD
View
A
Retailer 13
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$824 USD
View
A
Retailer 14
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$908 USD
View
B+
Retailer 15
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$1,076 USD
View
B+
Retailer 16
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$1,243 USD
View
B+
Retailer 17
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$1,315 USD
View
Retailer 18
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$1,346 USD
View
Price last confirmed 10 days ago
B+
Retailer 19
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$1,405 USD
View
B+
Retailer 20
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$1,442 USD
View
B+
Retailer 21
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$1,453 USD
View
B+
Retailer 22
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$1,508 USD
View
B+
Retailer 23
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$1,549 USD
View
Retailer 24
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$2,460 USD
View
Price last confirmed 8 days ago
B
Retailer 25
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$2,510 USD
View
Retailer 26
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$2,844 USD
View
Price last confirmed 9 days ago
Most Expensive
B
Brilliant Earth
20152527Y · Nov 4
$2,910 USD
View
26 more retailers have this diamond
Prices start from $282 USDSave up to $2,628 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
1.55ct Radiant
$282 USD