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Radiant|Lab Grown|IGI

1.28ct D FL Radiant Lab Grown Diamond

ID • D/FL • IGI LG801686051

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

Certificate IGI LG801686051

Diamond specifications and retailer prices

From $420 USD
As of October 30, 2026
Save $2,250 USD (84%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $2,670 USD at Do Amore Diamonds · As of October 30, 2026
View at Do Amore Diamonds

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 LG801686051 or 801686051. Listed at 15 retailers as of October 30, 2026, with prices from $420 to $2,670, a $2,250 spread on the same certified stone. Do Amore Diamonds lists it at $2,670. 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
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.5°
Pavilion angle35.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG801686051
Dimensions7.76 × 5.38 × 3.59 mm
L/W Ratio1.44
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
7.76 mm5.38 mm1.28 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG801686051
Side View
Table 63.0%Crown 42.5°Girdle: MED-STKPavilion 35.2°Culet: NoneDepth 66.7%

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: $2,670 USD|Low: $300 USD|High: $3,400 USD|Avg: $1,311 USD|-9.8%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 31, 2026
Retailer 4$420 USD
Retailer 6$426 USD
Retailer 7$533 USD
Retailer 12$550 USD
Retailer 9$611 USD
Retailer 3$692 USD
Retailer 2$699 USD
Retailer 8$1,147 USD
Retailer 10$1,654 USD
Retailer 5$2,380 USD
Retailer 11$2,475 USD
Do Amore Diamonds$2,670 USD

35 data points across 12 retailers

15 retailers$420 USD to $2,670 USD

Retailer 1
-
$317 USD
Price last confirmed 20 days ago
Retailer 2
-
$367 USD
View
Price last confirmed 17 days ago
A
Retailer 3
-
$420 USD
View
Final sale: no returns
A
Retailer 4
-
$426 USD
£335 GBP
View
A
Retailer 5
-
$533 USD
View
A
Retailer 6
-
$550 USD
View
A
Retailer 7
-
$611 USD
View
A
Retailer 8
-
$692 USD
View
A
Retailer 9
-
$699 USD
€666 EUR
View
B+
Retailer 10
-
$1,147 USD
View
Retailer 11
-
$1,394 USD
View
Price last confirmed 21 days ago
B+
Retailer 12
-
$1,654 USD
£1,302 GBP
View
B
Retailer 13
-
$2,380 USD
View
Retailer 14
-
$2,475 USD
View
Price last confirmed 12 days ago
Most Expensive
B
Do Amore Diamonds
27-43D2CC484 · Oct 30
$2,670 USD
View
14 more retailers have this diamond
Prices start from $420 USDSave up to $2,250 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
$420 USD