Cushion|Lab Grown|IGI

0.51ct D VS1 Cushion Lab Grown Diamond

VG • D/VS1 • IGI LG838654643

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG838654643

Diamond specifications and retailer prices

From $458 NZD
$258 USD
As of October 30, 2026
Save $596 NZD (57%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $1,054 NZD at Riddles Jewelry · As of October 29, 2026
View at Riddles Jewelry

About this 0.51ct lab-grown cushion diamond

This 0.51ct lab-grown cushion sits in the half to three-quarter carat band, graded D colour (colourless) and VS1 clarity (very-slightly-included), with a very-good cut grade and certified by IGI LG838654643 or 838654643. Listed at 9 retailers as of October 29, 2026, with prices from $458 to $1,054, a $596 spread on the same certified stone. Riddles Jewelry lists it at $1,054. 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

0.51
Carat
D
Colour
VS1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle37.4°
Pavilion angle37.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG838654643
Dimensions5.13 × 4.12 × 2.96 mm
L/W Ratio1.25
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
5.13 mm4.12 mm0.51 ctD / VS1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG838654643
Side View
Table 65.0%Crown 37.4°Girdle: MED-THKPavilion 37.6°Culet: NoneDepth 71.8%

Caratlytics Score

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A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $892 NZD|Low: $247 NZD|High: $1,689 NZD|Avg: $737 NZD|+8.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Riddles Jewelry
October 19, 2026
Retailer 12$247 NZD
Retailer 7$458 NZD
Retailer 11$472 NZD
Retailer 2$477 NZD
Retailer 5$541 NZD
Retailer 6$541 NZD
Retailer 8$568 NZD
Retailer 10$681 NZD
Retailer 9$727 NZD
Retailer 3$834 NZD
Retailer 1$892 NZD
Retailer 4$980 NZD
Riddles Jewelry$1,054 NZD
Retailer 13$1,689 NZD

12 data points across 14 retailers

9 retailers$458 NZD to $1,054 NZD

A
Cheapest Retailer
-
$458 NZD
$258 USD
Retailer 2
-
$472 NZD
$266 USD
View
Price last confirmed 27 days ago
B+
Retailer 3
-
$541 NZD
$305 USD
View
Retailer 4
-
$568 NZD
$320 USD
View
Price last confirmed 25 days ago
Retailer 5
-
$681 NZD
£302 GBP
View
Price last confirmed 25 days ago
Retailer 6
-
$727 NZD
$410 USD
View
Price last confirmed 26 days ago
B
Retailer 7
-
$892 NZD
CA$699 CAD
View
Retailer 8
-
$980 NZD
$552 USD
View
Price last confirmed 28 days ago
Most Expensive
B
Riddles Jewelry
1989204854 · Oct 29
$1,054 NZD
$594 USD
View
8 more retailers have this diamond
Prices start from $458 NZDSave up to $596 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
0.51ct Cushion
$458 NZD