CaratHunter
Plans
Round|Lab Grown|IGI

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 $125 AUD
$88 USD
As of October 26, 2026
Save $1,064 AUD (89%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $1,190 AUD 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 14 retailers as of October 26, 2026, with prices from $125 to $1,190, a $1,064 spread on the same certified stone. Reve Diamonds lists it at $1,190. 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: $1,148 AUD|Low: $121 AUD|High: $1,190 AUD|Avg: $408 AUD|-2.2%
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 29, 2026
Retailer 9$125 AUD
Retailer 10$139 AUD
Retailer 11$145 AUD
Retailer 3$165 AUD
Retailer 13$165 AUD
Retailer 7$283 AUD
Retailer 6$320 AUD
Retailer 4$328 AUD
Retailer 5$499 AUD
Retailer 8$557 AUD
Retailer 12$584 AUD
Retailer 2$593 AUD
Retailer 1$1,148 AUD
Reve Diamonds$1,190 AUD

42 data points across 14 retailers

14 retailers$125 AUD to $1,190 AUD

A
Cheapest Retailer
-
$125 AUD
$88 USD
A
Retailer 2
-
$139 AUD
$98 USD
View
Final sale: no returns
A
Retailer 3
-
$145 AUD
$102 USD
View
A
Retailer 4
-
$165 AUD
$116 USD
View
A
Retailer 5
-
$165 AUD
$116 USD
View
A
Retailer 6
-
$283 AUD
£157 GBP
View
A
Retailer 7
-
$320 AUD
€214 EUR
View
A
Retailer 8
-
$328 AUD
$231 USD
View
B+
Retailer 9
-
$499 AUD
$351 USD
View
B
Retailer 10
-
$557 AUD
$392 USD
View
B
Retailer 11
-
$584 AUD
$411 USD
View
B
Retailer 12
-
$593 AUD
$417 USD
View
B
Retailer 13
-
$1,148 AUD
£636 GBP
View
Most Expensive
B
Reve Diamonds
562D23476 · Oct 28
$1,190 AUD
$837 USD
View
13 more retailers have this diamond
Prices start from $125 AUDSave up to $1,064 AUD

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
$125 AUD