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Radiant|Lab Grown|IGI

3.18ct D IF Radiant Lab Grown Diamond

VG • D/IF • IGI LG828688643

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

Certificate IGI LG828688643

Diamond specifications and retailer prices

From $1,966 AUD
$1,381 USD
As of October 31, 2026
Save $15,502 AUD (89%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $17,468 AUD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 3.18ct lab-grown radiant diamond

This 3.18ct lab-grown radiant sits in the three to five carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a very-good cut grade and certified by IGI LG828688643 or 828688643. Listed at 18 retailers as of October 29, 2026, with prices from $1,966 to $17,468, a $15,502 spread on the same certified stone. Brilliant Earth lists it at $17,468. 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

3.18
Carat
D
Colour
IF
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.2°
Pavilion angle38.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG828688643
Dimensions10.11 × 7.21 × 5.01 mm
L/W Ratio1.40
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.11 mm7.21 mm3.18 ctD / IF
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG828688643
Side View
Table 70.0%Crown 43.2°Girdle: Slightly ThickPavilion 38.4°Culet: NoneDepth 69.5%

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 31
Current: $17,468 AUD|Low: $1,966 AUD|High: $17,468 AUD|Avg: $5,377 AUD
Brilliant Earth
Retailer 2
Retailer 3
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Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
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Retailer 15
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Retailer 17
October 31, 2026
Retailer 10$1,966 AUD
Retailer 12$2,285 AUD
Retailer 17$2,429 AUD
Retailer 16$2,500 AUD
Retailer 11$2,931 AUD
Retailer 7$2,947 AUD
Retailer 2$3,710 AUD
Retailer 15$3,899 AUD
Retailer 14$4,517 AUD
Retailer 5$4,754 AUD
Retailer 9$5,055 AUD
Retailer 8$5,978 AUD
Retailer 6$6,614 AUD
Retailer 4$7,138 AUD
Retailer 13$7,383 AUD
Retailer 3$7,642 AUD
Brilliant Earth$17,468 AUD

21 data points across 17 retailers

18 retailers$1,966 AUD to $17,468 AUD

A
Cheapest Retailer
-
$1,966 AUD
$1,381 USD
Final sale: no returns
A
Retailer 2
-
$2,285 AUD
$1,605 USD
View
A
Retailer 3
-
$2,429 AUD
£1,344 GBP
View
A
Retailer 4
-
$2,500 AUD
$1,756 USD
View
A
Retailer 5
-
$2,931 AUD
£1,621 GBP
View
A
Retailer 6
-
$2,947 AUD
$2,070 USD
View
Retailer 7
-
$3,710 AUD
€2,482 EUR
View
A
Retailer 8
-
$3,899 AUD
$2,739 USD
View
A
Retailer 9
-
$4,517 AUD
$3,173 USD
View
A
Retailer 10
-
$4,754 AUD
ZAR 53,954 ZAR
View
Retailer 11
-
$5,055 AUD
£2,796 GBP
View
Price last confirmed 9 days ago
B+
Retailer 12
-
$5,978 AUD
$4,199 USD
View
B+
Retailer 13
-
$6,614 AUD
£3,658 GBP
View
B+
Retailer 14
-
$7,138 AUD
$5,014 USD
View
B+
Retailer 15
-
$7,383 AUD
$5,186 USD
View
B
Retailer 16
-
$7,642 AUD
SGD 7,254 SGD
View
Retailer 17
-
$10,087 AUD
View
Price last confirmed 22 days ago
Most Expensive
B
Brilliant Earth
21324580A · Oct 29
$17,468 AUD
$12,270 USD
View
17 more retailers have this diamond
Prices start from $1,966 AUDSave up to $15,502 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
3.18ct Radiant
$1,966 AUD