Radiant|Lab Grown|IGI

1.28ct D FL Radiant Lab Grown Diamond

EX • D/FL • IGI LG815698208

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

Certificate IGI LG815698208

Diamond specifications and retailer prices

From $239 USD
As of October 30, 2026
Save $2,051 USD (90%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $2,475 USD at Rare Carat · As of October 18, 2026
View at Rare Carat

About this 1.28ct lab-grown radiant diamond

This 1.28ct lab-grown radiant sits in the one-and-a-quarter to one-and-a-half carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG815698208 or 815698208. Listed at 14 retailers as of October 30, 2026, with a 858% 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

1.28
Carat
D
Color
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle45°
Pavilion angle34.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG815698208
Dimensions7.54 × 5.35 × 3.60 mm
L/W Ratio1.41
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
7.54 mm5.35 mm1.28 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG815698208
Side View
Table 65.0%Crown 45°Girdle: STK-THKPavilion 34.3°Culet: NoneDepth 67.3%

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 30
Current: $2,475 USD|Low: $239 USD|High: $3,290 USD|Avg: $1,088 USD|+5.4%
Rare Carat
Retailer 2
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Retailer 21
October 30, 2026
Retailer 16$239 USD
Retailer 9$271 USD
Retailer 4$277 USD
Retailer 14$306 USD
Retailer 13$338 USD
Retailer 20$499 USD
Retailer 17$538 USD
Retailer 10$769 USD
Retailer 8$786 USD
Retailer 7$835 USD
Retailer 11$895 USD
Retailer 19$956 USD
Retailer 5$960 USD
Retailer 21$1,051 USD
Retailer 3$1,100 USD
Retailer 15$1,318 USD
Retailer 12$1,568 USD
Retailer 6$1,868 USD
Retailer 2$2,010 USD
Retailer 18$2,290 USD
Rare Carat$2,475 USD

22 data points across 21 retailers

14 retailers$239 USD to $2,290 USD

A
Cheapest Retailer
-
$239 USD
A
Retailer 2
-
$277 USD
View
A
Retailer 3
-
$338 USD
£266 GBP
View
A
Retailer 4
-
$499 USD
View
A
Retailer 5
-
$538 USD
View
B+
Retailer 6
-
$956 USD
View
Retailer 7
-
$960 USD
View
Price last confirmed 8 days ago
B+
Retailer 8
-
$1,051 USD
View
B+
Retailer 9
-
$1,100 USD
View
B+
Retailer 10
-
$1,318 USD
£1,038 GBP
View
B
Retailer 11
-
$1,868 USD
View
B
Retailer 12
-
$2,010 USD
View
B
Retailer 13
-
$2,290 USD
View
Most Expensive
Rare Carat
VR-220174 · Oct 18
$2,475 USD
View
Price last confirmed 12 days ago
13 more retailers have this diamond
Prices start from $239 USDSave up to $2,051 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
1.28ct Radiant
$239 USD