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0.51ct D SI1 Round Lab Grown Diamond

ID • D/SI1 • IGI LG782655554

Shape and cutting style on the report: Round brilliant

Certificate IGI LG782655554

Diamond specifications and retailer prices

From $156 NZD
$88 USD
As of October 26, 2026
Save $1,328 NZD (89%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $1,484 NZD at Reve Diamonds · As of October 28, 2026
View at Reve Diamonds

About this 0.51ct lab-grown round diamond

This 0.51ct lab-grown round sits in the half to three-quarter carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG782655554 or 782655554. Listed at 13 retailers as of October 26, 2026, with prices from $156 to $1,484, a $1,328 spread on the same certified stone. Reve Diamonds lists it at $1,484. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

0.51
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.1°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG782655554
Dimensions5.12 × 5.16 × 3.12 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
5.12 mm5.16 mm0.51 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG782655554
Side View
Table 60.0%Crown 33.1°Girdle: MediumPavilion 41°Culet: NoneDepth 60.7%

Caratlytics Score

How it works →
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 26
Current: $397 NZD|Low: $151 NZD|High: $1,484 NZD|Avg: $516 NZD|+5.4%
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
Reve Diamonds
October 31, 2026
Retailer 9$156 NZD
Retailer 10$174 NZD
Retailer 11$181 NZD
Retailer 3$206 NZD
Retailer 13$206 NZD
Retailer 6$355 NZD
Retailer 1$397 NZD
Retailer 4$410 NZD
Retailer 5$623 NZD
Retailer 8$696 NZD
Retailer 12$729 NZD
Retailer 2$740 NZD
Retailer 7$1,433 NZD
Reve Diamonds$1,484 NZD

41 data points across 14 retailers

13 retailers$156 NZD to $1,484 NZD

A
Cheapest Retailer
-
$156 NZD
$88 USD
A
Retailer 2
-
$181 NZD
$102 USD
View
A
Retailer 3
-
$206 NZD
$116 USD
View
A
Retailer 4
-
$206 NZD
$116 USD
View
A
Retailer 5
-
$355 NZD
£157 GBP
View
A
Retailer 6
-
$397 NZD
€213 EUR
View
A
Retailer 7
-
$410 NZD
$231 USD
View
B+
Retailer 8
-
$623 NZD
$351 USD
View
B
Retailer 9
-
$696 NZD
$392 USD
View
B
Retailer 10
-
$729 NZD
$411 USD
View
B
Retailer 11
-
$740 NZD
$417 USD
View
B
Retailer 12
-
$1,433 NZD
£636 GBP
View
Most Expensive
B
Reve Diamonds
562D23476 · Oct 28
$1,484 NZD
$837 USD
View
12 more retailers have this diamond
Prices start from $156 NZDSave up to $1,328 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 Round
$156 NZD