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Radiant|Lab Grown|IGI

1.56ct I VS1 Radiant Lab Grown Diamond

VG • I/VS1 • IGI LG508122912

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

Certificate IGI LG508122912

Diamond specifications and retailer prices

From $678 NZD
$382 USD
As of October 30, 2026
Save $2,091 NZD (76%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $3,301 NZD at MOH London · As of October 21, 2026
View at MOH London

About this 1.56ct lab-grown radiant diamond

This 1.56ct lab-grown radiant sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and VS1 clarity (very-slightly-included), with a very-good cut grade and certified by IGI LG508122912 or 508122912. Listed at 15 retailers as of October 30, 2026, with a 308% 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

1.56
Carat
I
Colour
VS1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.8°
Pavilion angle34.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG508122912
Dimensions8.05 × 5.67 × 3.92 mm
L/W Ratio1.42
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
8.05 mm5.67 mm1.56 ctI / VS1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG508122912
Side View
Table 63.0%Crown 43.8°Girdle: Slightly ThickPavilion 34.6°Culet: NoneDepth 69.1%

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 30
Current: $3,301 NZD|Low: $651 NZD|High: $3,324 NZD|Avg: $1,657 NZD|+0.5%
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
Retailer 14
October 28, 2026
Retailer 9$678 NZD
Retailer 14$758 NZD
Retailer 11$841 NZD
Retailer 4$940 NZD
Retailer 7$1,100 NZD
Retailer 13$1,277 NZD
Retailer 12$1,340 NZD
Retailer 2$1,444 NZD
Retailer 10$1,650 NZD
Retailer 6$1,902 NZD
Retailer 3$2,271 NZD
Retailer 8$2,356 NZD
Retailer 5$2,768 NZD
MOH London$3,301 NZD

24 data points across 14 retailers

15 retailers$678 NZD to $2,768 NZD

A
Cheapest Retailer
-
$678 NZD
$382 USD
A
Retailer 2
-
$758 NZD
$427 USD
View
Final sale: no returns
A
Retailer 3
-
$759 NZD
$428 USD
View
Retailer 4
-
$841 NZD
$474 USD
View
Price last confirmed 7 days ago
A
Retailer 5
-
$841 NZD
$474 USD
View
B+
Retailer 6
-
$940 NZD
$530 USD
View
B+
Retailer 7
-
$1,100 NZD
$620 USD
View
B+
Retailer 8
-
$1,277 NZD
$720 USD
View
B+
Retailer 9
-
$1,340 NZD
$755 USD
View
B+
Retailer 10
-
$1,444 NZD
ZAR 13,146 ZAR
View
B
Retailer 11
-
$1,650 NZD
$930 USD
View
B
Retailer 12
-
$2,356 NZD
$1,328 USD
View
B
Retailer 13
-
$2,700 NZD
$1,522 USD
View
B
Retailer 14
-
$2,768 NZD
$1,560 USD
View
Most Expensive
MOH London
LG508122912 · Oct 21
$3,301 NZD
£1,465 GBP
View
Price last confirmed 11 days ago
14 more retailers have this diamond
Prices start from $678 NZDSave up to $2,091 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.

A
1.56ct Radiant
$678 NZD