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Radiant|Lab Grown|IGI

1.56ct D IF Radiant Lab Grown Diamond

ID • D/IF • IGI LG645443327

Certificate IGI LG645443327

Diamond specifications and retailer prices

From $299 USD
Save $3,171 USD (91%) vs most expensive(unlock to see where)
26 retailers carry this diamond
Most expensive: $3,470 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 LG645443327 or 645443327. Listed at 26 retailers, with prices from $299 to $3,470 at Brilliant Earth, a $3,171 spread on the same certified stone. 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 angle41.9°
Pavilion angle33.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG645443327
Dimensions5.78 × 5.78 × 8.19 mm
L/W Ratio1.00
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
5.78 mm5.78 mm1.56 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG645443327
Side View
Table 65.0%Crown 41.9°Girdle: MediumPavilion 33.7°Culet: NoneDepth 66.1%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0-100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Sep 30
Current: $3,470 USD|Low: $238 USD|High: $4,250 USD|Avg: $1,266 USD|-18.4%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
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Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
Retailer 20
October 1, 2026
Retailer 2$358 USD
Retailer 13$472 USD
Retailer 3$525 USD
Retailer 6$632 USD
Retailer 4$650 USD
Retailer 19$689 USD
Retailer 14$724 USD
Retailer 8$837 USD
Retailer 10$927 USD
Retailer 18$950 USD
Retailer 15$1,040 USD
Retailer 9$1,477 USD
Retailer 12$1,506 USD
Retailer 7$1,533 USD
Retailer 5$1,576 USD
Retailer 16$1,660 USD
Retailer 20$1,680 USD
Retailer 17$2,495 USD
Retailer 11$2,660 USD
Brilliant Earth$3,470 USD

43 data points across 20 retailers

26 retailers$299 USD to $3,470 USD

A
Cheapest Retailer
-
$299 USD
A
Retailer 2
-
$347 USD
View
A
Retailer 3
-
$358 USD
View
A
Retailer 4
-
$366 USD
View
A
Retailer 5
-
$472 USD
View
A
Retailer 6
-
$525 USD
View
A
Retailer 7
-
$563 USD
HK$4,400 HKD
View
Price last confirmed 27 days ago
A
Retailer 8
-
$632 USD
View
A
Retailer 9
-
$650 USD
€619 EUR
View
A
Retailer 10
-
$689 USD
ZAR 11,130 ZAR
View
A
Retailer 11
-
$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
-
$837 USD
View
A
Retailer 14
-
$927 USD
View
A
Retailer 15
-
$950 USD
A$1,462 AUD
View
A
Retailer 16
-
$1,040 USD
View
B+
Retailer 17
-
$1,316 USD
View
B+
Retailer 18
-
$1,477 USD
View
B+
Retailer 19
-
$1,506 USD
View
B+
Retailer 20
-
$1,533 USD
View
B+
Retailer 21
-
$1,576 USD
SGD 2,130 SGD
View
B+
Retailer 22
-
$1,660 USD
£1,307 GBP
View
B+
Retailer 23
-
$1,680 USD
A$2,585 AUD
View
B
Retailer 24
-
$2,495 USD
View
B
Retailer 25
-
$2,660 USD
View
Most Expensive
B
Brilliant Earth
13057128Y · Oct 1
$3,470 USD
View
25 more retailers have this diamond
Prices start from $299 USDSave up to $3,171 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
$299 USD