Round|Lab Grown|IGI

1.28ct D FL Round Lab Grown Diamond

ID • D/FL • IGI LG836617751

Shape and cutting style on the report: Round brilliant

Certificate IGI LG836617751

Diamond specifications and retailer prices

From $304 USD
As of October 28, 2026
Save $1,576 USD (84%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $1,880 USD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.28ct lab-grown round diamond

This 1.28ct lab-grown round 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 LG836617751 or 836617751. Listed at 16 retailers as of October 28, 2026, with prices from $304 to $1,880, a $1,576 spread on the same certified stone. Brilliant Earth lists it at $1,880. 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 angle35.8°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG836617751
Dimensions6.90 × 6.95 × 4.31 mm
L/W Ratio1.01
Girdle conditionFaceted
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
6.90 mm6.95 mm1.28 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG836617751
Side View
Table 58.0%Crown 35.8°Girdle: MED-STKPavilion 40.9°Culet: NoneDepth 62.2%

Caratlytics Score

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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 28
Current: $1,880 USD|Low: $304 USD|High: $2,220 USD|Avg: $887 USD|-15.3%
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
October 29, 2026
Retailer 7$304 USD
Retailer 4$337 USD
Retailer 3$525 USD
Retailer 11$537 USD
Retailer 5$557 USD
Retailer 9$559 USD
Retailer 12$578 USD
Retailer 2$590 USD
Retailer 6$790 USD
Retailer 16$1,034 USD
Retailer 14$1,093 USD
Retailer 8$1,133 USD
Retailer 13$1,200 USD
Retailer 10$1,356 USD
Retailer 15$1,595 USD
Brilliant Earth$1,880 USD

26 data points across 16 retailers

16 retailers$304 USD to $1,880 USD

A
Cheapest Retailer
-
$304 USD
Final sale: no returns
A
Retailer 2
-
$337 USD
View
A
Retailer 3
-
$525 USD
View
A
Retailer 4
-
$537 USD
£423 GBP
View
A
Retailer 5
-
$557 USD
View
A
Retailer 6
-
$559 USD
€532 EUR
View
A
Retailer 7
-
$578 USD
ZAR 9,344 ZAR
View
A
Retailer 8
-
$590 USD
£465 GBP
View
A
Retailer 9
-
$790 USD
View
B+
Retailer 10
-
$1,034 USD
View
B+
Retailer 11
-
$1,093 USD
SGD 1,477 SGD
View
B+
Retailer 12
-
$1,133 USD
View
B+
Retailer 13
-
$1,200 USD
View
B+
Retailer 14
-
$1,356 USD
£1,068 GBP
View
B+
Retailer 15
-
$1,595 USD
View
Price last confirmed 8 days ago
Most Expensive
B
Brilliant Earth
21640958A · Oct 29
$1,880 USD
View
15 more retailers have this diamond
Prices start from $304 USDSave up to $1,576 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 Round
$304 USD