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Heart|Lab Grown|IGI

1.25ct E SI1 Heart Lab Grown Diamond

EX • E/SI1 • IGI LG770664488

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG770664488

Diamond specifications and retailer prices

From $203 USD
As of October 28, 2026
Save $933 USD (82%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $1,136 USD at Reve Diamonds · As of October 30, 2026
View at Reve Diamonds

About this 1.25ct lab-grown heart diamond

This 1.25ct 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 LG770664488 or 770664488. Listed at 12 retailers as of October 28, 2026, with prices from $203 to $1,136, a $933 spread on the same certified stone. Reve Diamonds lists it at $1,136. 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

1.25
Carat
E
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle33.7°
Pavilion angle40°
OriginLab Grown
Grading LabIGI
CertificateIGI LG770664488
Dimensions6.71 × 7.46 × 4.29 mm
L/W Ratio1.11
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.71 mm7.46 mm1.25 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG770664488
Side View
Table 60.0%Crown 33.7°Girdle: MED-STKPavilion 40°Culet: NoneDepth 57.5%

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 28
Current: $407 USD|Low: $121 USD|High: $1,151 USD|Avg: $615 USD|+6.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Reve Diamonds
October 30, 2026
Retailer 2$121 USD
Retailer 8$203 USD
Retailer 5$397 USD
Retailer 1$407 USD
Retailer 7$423 USD
Retailer 6$549 USD
Retailer 4$645 USD
Retailer 9$779 USD
Retailer 3$1,059 USD
Retailer 10$1,110 USD
Reve Diamonds$1,136 USD

27 data points across 11 retailers

12 retailers$203 USD to $1,136 USD

A
Cheapest Retailer
-
$203 USD
Final sale: no returns
Retailer 2
-
$216 USD
View
Price last confirmed 31 days ago
Retailer 3
-
$228 USD
View
Price last confirmed 32 days ago
B+
Retailer 4
-
$397 USD
View
B+
Retailer 5
-
$407 USD
£320 GBP
View
B+
Retailer 6
-
$423 USD
View
B+
Retailer 7
-
$549 USD
View
B
Retailer 8
-
$645 USD
View
B
Retailer 9
-
$779 USD
View
Retailer 10
-
$1,059 USD
£834 GBP
View
Price last confirmed 9 days ago
B
Retailer 11
-
$1,110 USD
View
Most Expensive
B
Reve Diamonds
FA2468553 · Oct 30
$1,136 USD
View
11 more retailers have this diamond
Prices start from $203 USDSave up to $933 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
1.25ct Heart
$203 USD