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Heart|Lab Grown|IGI

1.78ct F VS1 Heart Lab Grown Diamond

ID • F/VS1 • IGI LG826687585

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG826687585

Diamond specifications and retailer prices

From $402 USD
As of November 1, 2026
Save $608 USD (60%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $1,196 USD at MOH London · As of October 26, 2026
View at MOH London

About this 1.78ct lab-grown heart diamond

This 1.78ct lab-grown heart sits in the one-and-a-half to two carat band, graded F colour (colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG826687585 or 826687585. Listed at 6 retailers as of October 31, 2026, with a 151% 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

1.78
Carat
F
Color
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.3°
Pavilion angle38.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG826687585
Dimensions8.18 × 7.23 × 4.91 mm
L/W Ratio1.13
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.18 mm7.23 mm1.78 ctF / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG826687585
Side View
Table 61.0%Crown 39.3°Girdle: STK-THKPavilion 38.8°Culet: NoneDepth 60.0%

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: Nov 1
Current: $1,196 USD|Low: $402 USD|High: $1,222 USD|Avg: $805 USD|-2.0%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 2, 2026
Retailer 3$402 USD
Retailer 2$564 USD
Retailer 4$682 USD
Retailer 5$1,010 USD
Retailer 6$1,080 USD
MOH London$1,196 USD

41 data points across 6 retailers

6 retailers$402 USD to $1,010 USD

B+
Cheapest Retailer
-
$402 USD
A
Retailer 2
-
$564 USD
£444 GBP
View
B+
Retailer 3
-
$682 USD
View
B+
Retailer 4
-
$1,010 USD
View
Retailer 5
-
$1,080 USD
A$1,661 AUD
View
Price last confirmed 8 days ago
Most Expensive
B
MOH London
LG826687585 · Oct 26
$1,196 USD
£942 GBP
View
Price last confirmed 7 days ago
5 more retailers have this diamond
Prices start from $402 USDSave up to $608 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
1.78ct Heart
$402 USD