Radiant|Lab Grown|IGI

4.51ct D VS1 Radiant Lab Grown Diamond

VG • D/VS1 • IGI LG765631503

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

Certificate IGI LG765631503

Diamond specifications and retailer prices

From $1,298 AUD
$912 USD
As of October 30, 2026
Save $7,158 AUD (85%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: $10,342 AUD at Queensmith · As of October 10, 2026
View at Queensmith

About this 4.51ct lab-grown radiant diamond

This 4.51ct lab-grown radiant sits in the three to five carat band, graded D colour (colourless) and VS1 clarity (very-slightly-included), with a very-good cut grade and certified by IGI LG765631503 or 765631503. Listed at 23 retailers as of October 30, 2026, with a 551% 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

4.51
Carat
D
Colour
VS1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.7°
Pavilion angle41.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG765631503
Dimensions11.25 × 8.02 × 5.71 mm
L/W Ratio1.40
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.25 mm8.02 mm4.51 ctD / VS1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG765631503
Side View
Table 70.0%Crown 39.7°Girdle: Slightly ThickPavilion 41.3°Culet: NoneDepth 71.2%

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: $5,098 AUD|Low: $1,298 AUD|High: $14,791 AUD|Avg: $4,268 AUD|+9.8%
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
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
Retailer 20
Retailer 21
October 30, 2026
Retailer 6$1,298 AUD
Retailer 21$1,414 AUD
Retailer 16$1,438 AUD
Retailer 7$1,758 AUD
Retailer 5$1,977 AUD
Retailer 19$2,283 AUD
Retailer 17$2,320 AUD
Retailer 15$2,416 AUD
Retailer 4$3,055 AUD
Retailer 18$3,206 AUD
Retailer 20$3,225 AUD
Retailer 2$3,606 AUD
Retailer 10$4,166 AUD
Retailer 3$4,235 AUD
Retailer 11$4,705 AUD
Retailer 1$5,098 AUD
Retailer 13$5,136 AUD
Retailer 14$5,140 AUD
Retailer 9$5,236 AUD
Retailer 8$7,189 AUD
Retailer 12$8,456 AUD

32 data points across 21 retailers

23 retailers$1,298 AUD to $8,456 AUD

A
Cheapest Retailer
-
$1,298 AUD
$912 USD
A
Retailer 2
-
$1,414 AUD
$993 USD
View
A
Retailer 3
-
$1,438 AUD
£796 GBP
View
Retailer 4
-
$1,542 AUD
$1,083 USD
View
Price last confirmed 35 days ago
A
Retailer 5
-
$1,758 AUD
$1,235 USD
View
A
Retailer 6
-
$1,977 AUD
$1,389 USD
View
Retailer 7
-
$2,283 AUD
€1,527 EUR
View
Price last confirmed 7 days ago
A
Retailer 8
-
$2,320 AUD
£1,283 GBP
View
A
Retailer 9
-
$2,416 AUD
$1,697 USD
View
B+
Retailer 10
-
$3,055 AUD
$2,146 USD
View
B+
Retailer 11
-
$3,206 AUD
ZAR 36,386 ZAR
View
Retailer 12
-
$3,225 AUD
View
Price last confirmed 9 days ago
B+
Retailer 13
-
$3,606 AUD
$2,533 USD
View
B+
Retailer 14
-
$4,166 AUD
£2,304 GBP
View
B+
Retailer 15
-
$4,235 AUD
$2,975 USD
View
B
Retailer 16
-
$4,705 AUD
$3,305 USD
View
B
Retailer 17
-
$5,098 AUD
$3,581 USD
View
B
Retailer 18
-
$5,136 AUD
£2,841 GBP
View
Retailer 19
-
$5,140 AUD
View
Price last confirmed 22 days ago
B
Retailer 20
-
$5,236 AUD
$3,678 USD
View
B
Retailer 21
-
$7,189 AUD
$5,050 USD
View
B
Retailer 22
-
$8,456 AUD
$5,940 USD
View
Most Expensive
Queensmith
LG765631503 · Oct 10
$10,342 AUD
£5,720 GBP
View
Price last confirmed 20 days ago
22 more retailers have this diamond
Prices start from $1,298 AUDSave up to $7,158 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
4.51ct Radiant
$1,298 AUD