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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 $433 AUD
$304 USD
As of October 30, 2026
Save $2,243 AUD (84%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $2,676 AUD 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 29, 2026, with prices from $433 to $2,676, a $2,243 spread on the same certified stone. Brilliant Earth lists it at $2,676. 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
Colour
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

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: $2,676 AUD|Low: $433 AUD|High: $3,160 AUD|Avg: $1,252 AUD|-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 30, 2026
Retailer 7$433 AUD
Retailer 4$480 AUD
Retailer 3$747 AUD
Retailer 2$762 AUD
Retailer 5$793 AUD
Retailer 10$795 AUD
Retailer 12$823 AUD
Retailer 9$840 AUD
Retailer 6$1,124 AUD
Retailer 16$1,472 AUD
Retailer 14$1,556 AUD
Retailer 8$1,613 AUD
Retailer 13$1,708 AUD
Retailer 11$1,931 AUD
Retailer 15$2,270 AUD
Brilliant Earth$2,676 AUD

27 data points across 16 retailers

16 retailers$433 AUD to $2,676 AUD

A
Cheapest Retailer
-
$433 AUD
$304 USD
Final sale: no returns
A
Retailer 2
-
$480 AUD
$337 USD
View
A
Retailer 3
-
$747 AUD
$525 USD
View
A
Retailer 4
-
$762 AUD
£422 GBP
View
A
Retailer 5
-
$793 AUD
$557 USD
View
A
Retailer 6
-
$795 AUD
€532 EUR
View
A
Retailer 7
-
$823 AUD
ZAR 9,344 ZAR
View
A
Retailer 8
-
$840 AUD
£465 GBP
View
A
Retailer 9
-
$1,124 AUD
$790 USD
View
B+
Retailer 10
-
$1,472 AUD
$1,034 USD
View
B+
Retailer 11
-
$1,556 AUD
SGD 1,477 SGD
View
B+
Retailer 12
-
$1,613 AUD
$1,133 USD
View
B+
Retailer 13
-
$1,708 AUD
$1,200 USD
View
B+
Retailer 14
-
$1,931 AUD
£1,068 GBP
View
Retailer 15
-
$2,270 AUD
$1,595 USD
View
Price last confirmed 8 days ago
Most Expensive
B
Brilliant Earth
21640958A · Oct 29
$2,676 AUD
$1,880 USD
View
15 more retailers have this diamond
Prices start from $433 AUDSave up to $2,243 AUD

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
$433 AUD