Radiant|Lab Grown|IGI

1.55ct D IF Radiant Lab Grown Diamond

ID • D/IF • IGI LG648445944

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

Certificate IGI LG648445944

Diamond specifications and retailer prices

From $315 USD
As of October 27, 2026
Save $2,845 USD (90%) vs most expensive(unlock to see where)
25 retailers carry this diamond
Most expensive: $3,160 USD at Diamond Quarter · As of October 28, 2026
View at Diamond Quarter

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 LG648445944 or 648445944. Listed at 25 retailers as of October 27, 2026, with prices from $315 to $3,160, a $2,845 spread on the same certified stone. Diamond Quarter lists it at $3,160. 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
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.3°
Pavilion angle35°
OriginLab Grown
Grading LabIGI
CertificateIGI LG648445944
Dimensions8.41 × 5.77 × 3.85 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
8.41 mm5.77 mm1.55 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG648445944
Side View
Table 63.0%Crown 39.3°Girdle: MediumPavilion 35°Culet: NoneDepth 66.7%

Caratlytics Score

How it works →
A+
Exceptional
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 27
Current: $911 USD|Low: $302 USD|High: $2,605 USD|Avg: $974 USD|-0.8%
Retailer 1
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Retailer 23
October 28, 2026
Retailer 3$315 USD
Retailer 12$353 USD
Retailer 21$365 USD
Retailer 2$391 USD
Retailer 13$448 USD
Retailer 19$545 USD
Retailer 6$550 USD
Retailer 23$633 USD
Retailer 10$650 USD
Retailer 17$671 USD
Retailer 18$692 USD
Retailer 11$880 USD
Retailer 1$911 USD
Retailer 8$1,062 USD
Retailer 5$1,146 USD
Retailer 4$1,256 USD
Retailer 16$1,299 USD
Retailer 14$1,302 USD
Retailer 15$1,308 USD
Retailer 9$1,561 USD
Retailer 20$1,567 USD
Retailer 7$1,680 USD
Retailer 22$2,595 USD

31 data points across 23 retailers

25 retailers$315 USD to $3,160 USD

A+
Cheapest Retailer
-
$315 USD
A
Retailer 2
-
$353 USD
View
Final sale: no returns
A
Retailer 3
-
$365 USD
View
A
Retailer 4
-
$391 USD
View
A
Retailer 5
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$448 USD
HK$3,500 HKD
View
A
Retailer 6
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$545 USD
View
A
Retailer 7
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$550 USD
View
A
Retailer 8
-
$633 USD
€603 EUR
View
A
Retailer 9
-
$650 USD
View
A
Retailer 10
-
$671 USD
ZAR 10,844 ZAR
View
A
Retailer 11
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$692 USD
£545 GBP
View
A
Retailer 12
-
$880 USD
View
A
Retailer 13
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$911 USD
A$1,401 AUD
View
B+
Retailer 14
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$1,062 USD
View
B+
Retailer 15
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$1,146 USD
View
B+
Retailer 16
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$1,256 USD
View
B+
Retailer 17
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$1,299 USD
View
B+
Retailer 18
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$1,302 USD
View
B+
Retailer 19
-
$1,308 USD
SGD 1,768 SGD
View
B+
Retailer 20
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$1,561 USD
View
B+
Retailer 21
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$1,567 USD
£1,234 GBP
View
B+
Retailer 22
-
$1,680 USD
A$2,585 AUD
View
Price last confirmed 24 days ago
B
Retailer 23
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$2,595 USD
View
B
Retailer 24
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$2,610 USD
View
Price last confirmed 31 days ago
Most Expensive
B
Diamond Quarter
1.55IFDLG4480A4N · Oct 28
$3,160 USD
£2,488 GBP
View
24 more retailers have this diamond
Prices start from $315 USDSave up to $2,845 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
$315 USD