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 $758 NZD
€407 EUR
As of October 31, 2026
Save $1,655 NZD (69%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $2,413 NZD 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 31, 2026, with prices from $758 to $2,413, a $1,655 spread on the same certified stone. Brilliant Earth lists it at $2,413. 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

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: $2,413 NZD|Low: $410 NZD|High: $4,294 NZD|Avg: $1,290 NZD|-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 2, 2026
Retailer 3$410 NZD
Retailer 4$433 NZD
Retailer 10$438 NZD
Retailer 12$491 NZD
Retailer 8$758 NZD
Retailer 13$765 NZD
Retailer 2$804 NZD
Retailer 5$1,042 NZD
Retailer 6$1,089 NZD
Retailer 7$1,411 NZD
Retailer 11$1,416 NZD
Retailer 9$2,062 NZD
Brilliant Earth$2,413 NZD
Retailer 14$2,449 NZD

36 data points across 14 retailers

15 retailers$758 NZD to $2,413 NZD

Retailer 1
-
$410 NZD
$231 USD
Price last confirmed 35 days ago
Retailer 2
-
$433 NZD
$244 USD
View
Price last confirmed 35 days ago
Retailer 3
-
$438 NZD
$247 USD
View
Price last confirmed 20 days ago
Retailer 4
-
$438 NZD
$247 USD
View
Price last confirmed 7 days ago
Retailer 5
-
$491 NZD
£218 GBP
View
Price last confirmed 16 days ago
B+
Retailer 6
-
$758 NZD
€407 EUR
View
B
Retailer 7
-
$765 NZD
$431 USD
View
B+
Retailer 8
-
$804 NZD
£357 GBP
View
B+
Retailer 9
-
$1,042 NZD
$587 USD
View
B+
Retailer 10
-
$1,089 NZD
$614 USD
View
B
Retailer 11
-
$1,411 NZD
$795 USD
View
B
Retailer 12
-
$1,416 NZD
$798 USD
View
B
Retailer 13
-
$1,525 NZD
£677 GBP
View
B
Retailer 14
-
$2,062 NZD
£915 GBP
View
Most Expensive
B
Brilliant Earth
11433133A · Oct 31
$2,413 NZD
$1,360 USD
View
14 more retailers have this diamond
Prices start from $758 NZDSave up to $1,655 NZD

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.

B+
1.72ct Radiant
$758 NZD