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Heart|Lab Grown|IGI

1.57ct D FL Heart Lab Grown Diamond

ID • D/FL • IGI LG816616221

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG816616221

Diamond specifications and retailer prices

From $680 USD
As of October 30, 2026
Save $2,950 USD (81%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $3,630 USD at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.57ct lab-grown heart diamond

This 1.57ct lab-grown heart sits in the one-and-a-half to two carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG816616221 or 816616221. Listed at 18 retailers as of October 30, 2026, with prices from $680 to $3,630, a $2,950 spread on the same certified stone. Brilliant Earth lists it at $3,630. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.57
Carat
D
Color
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.7°
Pavilion angle39.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG816616221
Dimensions8.06 × 7.02 × 4.86 mm
L/W Ratio1.15
Girdle conditionFaceted
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
8.06 mm7.02 mm1.57 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG816616221
Side View
Table 59.0%Crown 39.7°Girdle: MED-STKPavilion 39.8°Culet: NoneDepth 60.3%

Caratlytics Score

How it works →
A
Excellent
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 30
Current: $3,630 USD|Low: $680 USD|High: $5,030 USD|Avg: $2,000 USD|-27.8%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
November 1, 2026
Retailer 6$680 USD
Retailer 3$739 USD
Retailer 14$788 USD
Retailer 2$859 USD
Retailer 12$965 USD
Retailer 17$1,211 USD
Retailer 10$1,262 USD
Retailer 13$1,284 USD
Retailer 11$1,449 USD
Retailer 8$1,769 USD
Retailer 15$2,217 USD
Retailer 7$2,598 USD
Retailer 4$2,719 USD
Retailer 9$3,088 USD
Retailer 5$3,285 USD
Retailer 16$3,326 USD
Brilliant Earth$3,630 USD

36 data points across 17 retailers

18 retailers$680 USD to $3,630 USD

A
Cheapest Retailer
-
$680 USD
A
Retailer 2
-
$739 USD
View
A
Retailer 3
-
$788 USD
View
Retailer 4
-
$816 USD
View
Price last confirmed 15 days ago
A
Retailer 5
-
$859 USD
View
Final sale: no returns
A
Retailer 6
-
$965 USD
View
B+
Retailer 7
-
$1,211 USD
View
B+
Retailer 8
-
$1,262 USD
£994 GBP
View
B+
Retailer 9
-
$1,284 USD
View
B+
Retailer 10
-
$1,449 USD
ZAR 23,412 ZAR
View
B+
Retailer 11
-
$1,769 USD
View
B+
Retailer 12
-
$2,217 USD
View
B+
Retailer 13
-
$2,598 USD
View
B
Retailer 14
-
$2,719 USD
View
B
Retailer 15
-
$3,088 USD
SGD 4,173 SGD
View
B
Retailer 16
-
$3,285 USD
View
B
Retailer 17
-
$3,326 USD
£2,619 GBP
View
Most Expensive
B
Brilliant Earth
21421995A · Oct 31
$3,630 USD
View
17 more retailers have this diamond
Prices start from $680 USDSave up to $2,950 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
1.57ct Heart
$680 USD