Radiant|Lab Grown|IGI

1.09ct E IF Radiant Lab Grown Diamond

ID • E/IF • IGI LG635497403

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

Certificate IGI LG635497403

Diamond specifications and retailer prices

From $209 USD
As of October 30, 2026
Save $1,013 USD (83%) vs most expensive(unlock to see where)
24 retailers carry this diamond
Most expensive: $1,870 USD at Brilliant Earth · As of October 15, 2026
View at Brilliant Earth

About this 1.09ct lab-grown radiant diamond

This 1.09ct lab-grown radiant sits in the classic one-carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG635497403 or 635497403. Listed at 24 retailers as of October 30, 2026, with a 485% 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

1.09
Carat
E
Color
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43°
Pavilion angle34.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG635497403
Dimensions7.19 × 5.13 × 3.49 mm
L/W Ratio1.40
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
7.19 mm5.13 mm1.09 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG635497403
Side View
Table 65.0%Crown 43°Girdle: MED-STKPavilion 34.7°Culet: NoneDepth 68.0%

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: Oct 30
Current: $1,870 USD|Low: $201 USD|High: $1,970 USD|Avg: $641 USD|+1.6%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
October 31, 2026
Retailer 6$209 USD
Retailer 4$234 USD
Retailer 9$242 USD
Retailer 7$259 USD
Retailer 10$259 USD
Retailer 3$276 USD
Retailer 15$350 USD
Retailer 19$420 USD
Retailer 16$445 USD
Retailer 12$478 USD
Retailer 11$573 USD
Retailer 2$631 USD
Retailer 17$634 USD
Retailer 8$833 USD
Retailer 14$937 USD
Retailer 13$1,044 USD
Retailer 18$1,210 USD
Retailer 5$1,222 USD
Brilliant Earth$1,870 USD

39 data points across 19 retailers

24 retailers$209 USD to $1,222 USD

A
Cheapest Retailer
-
$209 USD
A
Retailer 2
-
$234 USD
View
Final sale: no returns
A
Retailer 3
-
$242 USD
View
A
Retailer 4
-
$259 USD
View
A
Retailer 5
-
$259 USD
View
Retailer 6
-
$276 USD
£217 GBP
View
Price last confirmed 13 days ago
A
Retailer 7
-
$350 USD
View
Retailer 8
-
$420 USD
€400 EUR
View
Price last confirmed 7 days ago
A
Retailer 9
-
$445 USD
ZAR 7,193 ZAR
View
A
Retailer 10
-
$478 USD
£377 GBP
View
A
Retailer 11
-
$528 USD
View
A
Retailer 12
-
$573 USD
View
B+
Retailer 13
-
$631 USD
View
A
Retailer 14
-
$634 USD
A$975 AUD
View
A
Retailer 15
-
$643 USD
View
B+
Retailer 16
-
$833 USD
View
B+
Retailer 17
-
$885 USD
View
B+
Retailer 18
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$886 USD
View
B+
Retailer 19
-
$937 USD
A$1,441 AUD
View
B+
Retailer 20
-
$943 USD
£742 GBP
View
B+
Retailer 21
-
$1,044 USD
£822 GBP
View
Retailer 22
-
$1,210 USD
View
Price last confirmed 12 days ago
B
Retailer 23
-
$1,222 USD
View
Most Expensive
Brilliant Earth
10800488A · Oct 15
$1,870 USD
View
Price last confirmed 15 days ago
23 more retailers have this diamond
Prices start from $209 USDSave up to $1,013 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
$209 USD