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Radiant|Lab Grown|IGI

1.73ct D SI1 Radiant Lab Grown Diamond

GD • D/SI1 • IGI LG508155765

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

Certificate IGI LG508155765

Diamond specifications and retailer prices

From $1,354 NZD
$763 USD
As of October 30, 2026
Save $2,590 NZD (66%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $5,908 NZD at MOH London · As of November 1, 2026
View at MOH London

About this 1.73ct lab-grown radiant diamond

This 1.73ct 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 LG508155765 or 508155765. Listed at 13 retailers as of October 25, 2026, with a 191% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.73
Carat
D
Colour
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle46.3°
Pavilion angle29.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG508155765
Dimensions7.73 × 5.93 × 4.09 mm
L/W Ratio1.30
Culet sizePointed
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
7.73 mm5.93 mm1.73 ctD / SI1
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG508155765
Side View
Table 66.0%Crown 46.3°Girdle: Slightly ThickPavilion 29.9°Culet: NoneDepth 69.0%

Caratlytics Score

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B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $5,908 NZD|Low: $967 NZD|High: $5,987 NZD|Avg: $2,415 NZD
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 1, 2026
Retailer 10$1,210 NZD
Retailer 3$1,317 NZD
Retailer 4$1,354 NZD
Retailer 5$1,393 NZD
Retailer 11$1,403 NZD
Retailer 7$1,721 NZD
Retailer 6$2,172 NZD
Retailer 2$2,246 NZD
Retailer 13$2,282 NZD
Retailer 8$2,812 NZD
Retailer 9$3,582 NZD
Retailer 12$3,944 NZD
MOH London$5,908 NZD

44 data points across 13 retailers

13 retailers$1,354 NZD to $3,944 NZD

Retailer 1
-
$1,210 NZD
$682 USD
Price last confirmed 9 days ago
Retailer 2
-
$1,317 NZD
$742 USD
View
Price last confirmed 8 days ago
B
Retailer 3
-
$1,354 NZD
$763 USD
View
Final sale: no returns
B
Retailer 4
-
$1,393 NZD
$785 USD
View
B
Retailer 5
-
$1,403 NZD
$791 USD
View
B
Retailer 6
-
$1,721 NZD
$970 USD
View
B
Retailer 7
-
$2,172 NZD
€1,166 EUR
View
B
Retailer 8
-
$2,246 NZD
£997 GBP
View
B
Retailer 9
-
$2,282 NZD
$1,286 USD
View
B
Retailer 10
-
$2,812 NZD
$1,585 USD
View
C
Retailer 11
-
$3,582 NZD
$2,019 USD
View
C
Retailer 12
-
$3,944 NZD
$2,223 USD
View
Most Expensive
MOH London
LG508155765 · Nov 1
$5,908 NZD
£2,622 GBP
View
Price under review
12 more retailers have this diamond
Prices start from $1,354 NZDSave up to $2,590 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
1.73ct Radiant
$1,354 NZD