Radiant|Lab Grown|IGI

1.56ct D IF Radiant Lab Grown Diamond

ID • D/IF • IGI LG669419045

Certificate IGI LG669419045

Diamond specifications and retailer prices

From $330 USD
Save $2,280 USD (87%) vs most expensive(unlock to see where)
28 retailers carry this diamond
Most expensive: $4,320 USD at Brilliant Earth
View at Brilliant Earth

About this 1.56ct lab-grown radiant diamond

This 1.56ct 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 LG669419045 or 669419045. Listed at 28 retailers, with a 691% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.56
Carat
D
Color
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle44°
Pavilion angle34.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG669419045
Dimensions8.56 × 5.80 × 3.75 mm
L/W Ratio1.48
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
8.56 mm5.80 mm1.56 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG669419045
Side View
Table 63.0%Crown 44°Girdle: Slightly ThickPavilion 34.2°Culet: NoneDepth 64.7%

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: $4,320 USD|Low: $263 USD|High: $4,650 USD|Avg: $1,336 USD|-7.1%
Brilliant Earth
Retailer 2
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Retailer 26
October 1, 2026
Retailer 22$330 USD
Retailer 6$383 USD
Retailer 2$394 USD
Retailer 9$404 USD
Retailer 20$472 USD
Retailer 23$474 USD
Retailer 24$515 USD
Retailer 8$650 USD
Retailer 11$668 USD
Retailer 7$689 USD
Retailer 25$724 USD
Retailer 16$927 USD
Retailer 5$950 USD
Retailer 14$1,079 USD
Retailer 26$1,101 USD
Retailer 21$1,316 USD
Retailer 18$1,360 USD
Retailer 10$1,372 USD
Retailer 19$1,554 USD
Retailer 17$1,609 USD
Retailer 3$1,660 USD
Retailer 12$1,692 USD
Retailer 13$1,695 USD
Retailer 15$1,788 USD
Retailer 4$2,610 USD
Brilliant Earth$4,320 USD

41 data points across 26 retailers

28 retailers$330 USD to $2,610 USD

A
Cheapest Retailer
-
$330 USD
A
Retailer 2
-
$383 USD
View
A
Retailer 3
-
$394 USD
View
A
Retailer 4
-
$404 USD
View
A
Retailer 5
-
$472 USD
View
A
Retailer 6
-
$474 USD
HK$3,700 HKD
View
A
Retailer 7
-
$515 USD
View
A
Retailer 8
-
$650 USD
€619 EUR
View
A
Retailer 9
-
$668 USD
View
A
Retailer 10
-
$689 USD
ZAR 11,130 ZAR
View
A
Retailer 11
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$710 USD
£559 GBP
View
Price last confirmed 21 days ago
A
Retailer 12
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$725 USD
£571 GBP
View
A
Retailer 13
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$927 USD
View
A
Retailer 14
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$950 USD
A$1,462 AUD
View
A
Retailer 15
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$1,079 USD
View
A
Retailer 16
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$1,101 USD
View
B+
Retailer 17
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$1,316 USD
View
B+
Retailer 18
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$1,360 USD
View
B+
Retailer 19
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$1,372 USD
SGD 1,854 SGD
View
B+
Retailer 20
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$1,554 USD
£1,224 GBP
View
Price last confirmed 36 days ago
B+
Retailer 21
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$1,609 USD
View
B+
Retailer 22
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$1,660 USD
£1,307 GBP
View
B+
Retailer 23
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$1,692 USD
View
B+
Retailer 24
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$1,695 USD
A$2,607 AUD
View
B+
Retailer 25
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$1,825 USD
View
B
Retailer 26
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$2,504 USD
View
B
Retailer 27
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$2,610 USD
View
Most Expensive
B
Brilliant Earth
13182884A · Sep 17
$4,320 USD
View
Price last confirmed 13 days ago
27 more retailers have this diamond
Prices start from $330 USDSave up to $2,280 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
1.56ct Radiant
$330 USD