Radiant|Lab Grown|IGI

1.00ct E SI1 Radiant Lab Grown Diamond

ID • E/SI1 • IGI LG781638068

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG781638068

Diamond specifications and retailer prices

From $242 USD
As of November 6, 2026
Save $596 USD (71%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $838 USD at MOH London · As of November 4, 2026
View at MOH London

About this 1ct lab-grown radiant diamond

This 1ct lab-grown radiant sits in the classic one-carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG781638068 or 781638068. Listed at 10 retailers as of November 4, 2026, with prices from $242 to $838, a $596 spread on the same certified stone. MOH London lists it at $838. 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

1.00
Carat
E
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.3°
Pavilion angle35.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG781638068
Dimensions7.12 × 4.94 × 3.27 mm
L/W Ratio1.44
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
7.12 mm4.94 mm1.00 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG781638068
Side View
Table 66.0%Crown 42.3°Girdle: MediumPavilion 35.1°Culet: NoneDepth 66.2%

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: Nov 6
Current: $838 USD|Low: $242 USD|High: $850 USD|Avg: $450 USD|-0.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 9$242 USD
Retailer 8$286 USD
Retailer 3$306 USD
Retailer 2$313 USD
Retailer 5$341 USD
Retailer 4$400 USD
Retailer 7$424 USD
Retailer 10$633 USD
Retailer 6$700 USD
MOH London$838 USD

42 data points across 10 retailers

10 retailers$242 USD to $838 USD

B+
Cheapest Retailer
-
$242 USD
A
Retailer 2
-
$286 USD
View
A
Retailer 3
-
$306 USD
View
A
Retailer 4
-
$313 USD
View
A
Retailer 5
-
$341 USD
View
B+
Retailer 6
-
$400 USD
View
B+
Retailer 7
-
$424 USD
View
B
Retailer 8
-
$633 USD
View
Retailer 9
-
$700 USD
View
Price last confirmed 16 days ago
Most Expensive
B
MOH London
LG781638068 · Nov 4
$838 USD
£660 GBP
View
9 more retailers have this diamond
Prices start from $242 USDSave up to $596 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
1.00ct Radiant
$242 USD