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Radiant|Lab Grown|IGI

1.28ct D IF Radiant Lab Grown Diamond

ID • D/IF • IGI LG704537503

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

Certificate IGI LG704537503

Diamond specifications and retailer prices

From $1,050 AUD
As of November 2, 2026
Save $3,221 AUD (75%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: $4,271 AUD at Brilliant Earth · As of November 4, 2026
View at Brilliant Earth

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 IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG704537503 or 704537503. Listed at 3 retailers as of November 2, 2026, with prices from $1,050 to $4,271, a $3,221 spread on the same certified stone. Brilliant Earth lists it at $4,271. 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
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.1°
Pavilion angle33.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG704537503
Dimensions7.74 × 5.36 × 3.61 mm
L/W Ratio1.44
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.74 mm5.36 mm1.28 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG704537503
Side View
Table 64.0%Crown 42.1°Girdle: MED-STKPavilion 33.8°Culet: NoneDepth 67.4%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 2
Current: $4,271 AUD|Low: $1,050 AUD|High: $4,414 AUD|Avg: $2,436 AUD|-3.2%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
October 30, 2026
Retailer 3$1,050 AUD
Retailer 4$1,481 AUD
Retailer 2$2,114 AUD
Retailer 5$3,181 AUD
Brilliant Earth$4,271 AUD

6 data points across 5 retailers

3 retailers$1,050 AUD to $4,271 AUD

A
Cheapest Retailer
-
$1,050 AUD
B+
Retailer 2
-
$2,114 AUD
View
Most Expensive
B
Brilliant Earth
20170584Y · Nov 4
$4,271 AUD
$2,990 USD
View
2 more retailers have this diamond
Prices start from $1,050 AUDSave up to $3,221 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 Radiant
$1,050 AUD