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Radiant|Lab Grown|IGI

1.09ct F SI1 Radiant Lab Grown Diamond

GD • F/SI1 • IGI LG678501566

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

Certificate IGI LG678501566

Diamond specifications and retailer prices

From $135 USD
As of November 2, 2026
Save $1,270 USD (90%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $1,405 USD at MOH London · As of October 29, 2026
View at MOH London

About this 1.09ct lab-grown radiant diamond

This 1.09ct lab-grown radiant sits in the classic one-carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a standard cut grade and certified by IGI LG678501566 or 678501566. Listed at 11 retailers as of October 29, 2026, with prices from $135 to $1,405, a $1,270 spread on the same certified stone. MOH London lists it at $1,405. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.09
Carat
F
Color
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42°
Pavilion angle35.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG678501566
Dimensions7.42 × 5.01 × 3.41 mm
L/W Ratio1.48
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.42 mm5.01 mm1.09 ctF / SI1
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG678501566
Side View
Table 63.0%Crown 42°Girdle: ThinPavilion 35.2°Culet: NoneDepth 68.1%

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 2
Current: $1,405 USD|Low: $103 USD|High: $1,415 USD|Avg: $443 USD|+3.0%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 2, 2026
Retailer 7$135 USD
Retailer 11$151 USD
Retailer 10$157 USD
Retailer 2$217 USD
Retailer 3$259 USD
Retailer 5$298 USD
Retailer 4$488 USD
Retailer 12$492 USD
Retailer 8$538 USD
Retailer 9$567 USD
Retailer 6$568 USD
MOH London$1,405 USD

42 data points across 12 retailers

11 retailers$135 USD to $1,405 USD

A
Cheapest Retailer
-
$135 USD
B+
Retailer 2
-
$151 USD
View
Final sale: no returns
B+
Retailer 3
-
$157 USD
View
A
Retailer 4
-
$217 USD
£171 GBP
View
B+
Retailer 5
-
$298 USD
€284 EUR
View
B
Retailer 6
-
$492 USD
View
B
Retailer 7
-
$538 USD
View
Retailer 8
-
$567 USD
SGD 766 SGD
View
Price last confirmed 21 days ago
B
Retailer 9
-
$568 USD
View
C
Retailer 10
-
$858 USD
£676 GBP
View
Most Expensive
C
MOH London
LG678501566 · Oct 29
$1,405 USD
£1,106 GBP
View
10 more retailers have this diamond
Prices start from $135 USDSave up to $1,270 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
1.09ct Radiant
$135 USD