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Radiant|Lab Grown|IGI

1.72ct D SI1 Radiant Lab Grown Diamond

GD • D/SI1 • IGI LG646481247

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

Certificate IGI LG646481247

Diamond specifications and retailer prices

From $352 AUD
$247 USD
As of October 25, 2026
Save $1,584 AUD (82%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $1,936 AUD at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.72ct lab-grown radiant diamond

This 1.72ct lab-grown radiant sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a standard cut grade and certified by IGI LG646481247 or 646481247. Listed at 15 retailers as of October 25, 2026, with prices from $352 to $1,936, a $1,584 spread on the same certified stone. Brilliant Earth lists it at $1,936. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.72
Carat
D
Colour
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.1°
Pavilion angle35.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG646481247
Dimensions8.37 × 5.94 × 4.08 mm
L/W Ratio1.41
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.37 mm5.94 mm1.72 ctD / SI1
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG646481247
Side View
Table 65.0%Crown 43.1°Girdle: MediumPavilion 35.9°Culet: NoneDepth 68.7%

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 25
Current: $1,936 AUD|Low: $329 AUD|High: $3,445 AUD|Avg: $1,044 AUD|-43.8%
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
November 1, 2026
Retailer 3$329 AUD
Retailer 4$347 AUD
Retailer 10$352 AUD
Retailer 12$394 AUD
Retailer 8$608 AUD
Retailer 13$614 AUD
Retailer 2$645 AUD
Retailer 5$836 AUD
Retailer 6$874 AUD
Retailer 7$1,132 AUD
Retailer 11$1,136 AUD
Retailer 9$1,654 AUD
Brilliant Earth$1,936 AUD
Retailer 14$1,965 AUD

36 data points across 14 retailers

15 retailers$352 AUD to $1,936 AUD

Retailer 1
-
$329 AUD
$231 USD
Price last confirmed 34 days ago
Retailer 2
-
$347 AUD
$244 USD
View
Price last confirmed 35 days ago
Retailer 3
-
$352 AUD
$247 USD
View
Price last confirmed 20 days ago
A
Retailer 4
-
$352 AUD
$247 USD
View
Retailer 5
-
$394 AUD
£218 GBP
View
Price last confirmed 15 days ago
B+
Retailer 6
-
$608 AUD
€407 EUR
View
B
Retailer 7
-
$614 AUD
$431 USD
View
B+
Retailer 8
-
$645 AUD
£357 GBP
View
B+
Retailer 9
-
$836 AUD
$587 USD
View
B+
Retailer 10
-
$874 AUD
$614 USD
View
Retailer 11
-
$1,132 AUD
$795 USD
View
B
Retailer 12
-
$1,136 AUD
$798 USD
View
B
Retailer 13
-
$1,223 AUD
£677 GBP
View
B
Retailer 14
-
$1,654 AUD
£915 GBP
View
Most Expensive
B
Brilliant Earth
11433133A · Oct 31
$1,936 AUD
$1,360 USD
View
14 more retailers have this diamond
Prices start from $352 AUDSave up to $1,584 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
1.72ct Radiant
$352 AUD