CaratHunter
Plans
Heart|Lab Grown|IGI

1.28ct E SI1 Heart Lab Grown Diamond

ID • E/SI1 • IGI LG752551204

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG752551204

Diamond specifications and retailer prices

From $183 USD
As of October 30, 2026
Save $955 USD (84%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $1,138 USD at Reve Diamonds · As of October 30, 2026
View at Reve Diamonds

About this 1.28ct lab-grown heart diamond

This 1.28ct lab-grown heart sits in the one-and-a-quarter to one-and-a-half carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG752551204 or 752551204. Listed at 18 retailers as of October 30, 2026, with prices from $183 to $1,138, a $955 spread on the same certified stone. Reve Diamonds lists it at $1,138. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.28
Carat
E
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.9°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG752551204
Dimensions7.49 × 6.58 × 4.49 mm
L/W Ratio1.14
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.49 mm6.58 mm1.28 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG752551204
Side View
Table 62.0%Crown 37.9°Girdle: MED-THKPavilion 40.3°Culet: NoneDepth 59.9%

Caratlytics Score

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

Price History

Last verified: Oct 30
Current: $539 USD|Low: $175 USD|High: $1,140 USD|Avg: $458 USD|+10.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 31, 2026
Retailer 11$183 USD
Retailer 10$204 USD
Retailer 2$212 USD
Retailer 3$226 USD
Retailer 12$226 USD
Retailer 5$305 USD
Retailer 8$409 USD
Retailer 4$476 USD
Retailer 6$506 USD
Retailer 1$539 USD
Retailer 13$728 USD
Retailer 7$860 USD
Retailer 9$1,064 USD

44 data points across 13 retailers

18 retailers$183 USD to $1,138 USD

A
Cheapest Retailer
-
$183 USD
A
Retailer 2
-
$204 USD
View
Final sale: no returns
A
Retailer 3
-
$212 USD
View
A
Retailer 4
-
$226 USD
View
A
Retailer 5
-
$226 USD
View
B+
Retailer 6
-
$305 USD
View
B+
Retailer 7
-
$409 USD
£322 GBP
View
B+
Retailer 8
-
$441 USD
View
B+
Retailer 9
-
$476 USD
View
B+
Retailer 10
-
$506 USD
A$778 AUD
View
B+
Retailer 11
-
$539 USD
View
B+
Retailer 12
-
$573 USD
View
B
Retailer 13
-
$728 USD
View
B
Retailer 14
-
$739 USD
SGD 998 SGD
View
B
Retailer 15
-
$782 USD
View
B
Retailer 16
-
$860 USD
View
B
Retailer 17
-
$1,064 USD
£838 GBP
View
Most Expensive
B
Reve Diamonds
6E563C587 · Oct 30
$1,138 USD
View
17 more retailers have this diamond
Prices start from $183 USDSave up to $955 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
1.28ct Heart
$183 USD