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Radiant|Lab Grown|IGI

3.18ct D IF Radiant Lab Grown Diamond

ID • D/IF • IGI LG719530985

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

Certificate IGI LG719530985

Diamond specifications and retailer prices

From $1,748 AUD
$1,228 USD
As of October 30, 2026
Save $5,606 AUD (76%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: $17,453 AUD at Brilliant Earth · As of October 18, 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 top-tier cut grade and certified by IGI LG719530985 or 719530985. Listed at 23 retailers as of October 30, 2026, with a 321% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

3.18
Carat
D
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40.2°
Pavilion angle32.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG719530985
Dimensions10.92 × 7.29 × 4.61 mm
L/W Ratio1.50
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.92 mm7.29 mm3.18 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG719530985
Side View
Table 65.0%Crown 40.2°Girdle: MED-STKPavilion 32.4°Culet: NoneDepth 63.2%

Caratlytics Score

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A+
Exceptional
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: $17,453 AUD|Low: $1,748 AUD|High: $17,453 AUD|Avg: $4,959 AUD
Brilliant Earth
Retailer 2
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Retailer 5
Retailer 6
Retailer 7
Retailer 8
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Retailer 12
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Retailer 22
October 31, 2026
Retailer 12$1,748 AUD
Retailer 11$1,902 AUD
Retailer 6$2,027 AUD
Retailer 17$2,271 AUD
Retailer 9$2,386 AUD
Retailer 21$2,540 AUD
Retailer 16$2,901 AUD
Retailer 2$2,919 AUD
Retailer 19$3,223 AUD
Retailer 3$3,801 AUD
Retailer 10$3,885 AUD
Retailer 4$4,516 AUD
Retailer 22$4,587 AUD
Retailer 13$4,708 AUD
Retailer 8$4,903 AUD
Retailer 20$5,618 AUD
Retailer 18$6,523 AUD
Retailer 7$7,110 AUD
Retailer 5$7,354 AUD
Retailer 15$8,385 AUD
Retailer 14$10,087 AUD
Brilliant Earth$17,453 AUD

31 data points across 22 retailers

23 retailers$1,748 AUD to $7,354 AUD

A+
Cheapest Retailer
-
$1,748 AUD
$1,228 USD
A
Retailer 2
-
$1,902 AUD
$1,336 USD
View
A
Retailer 3
-
$2,027 AUD
$1,424 USD
View
A
Retailer 4
-
$2,271 AUD
$1,595 USD
View
A
Retailer 5
-
$2,386 AUD
$1,676 USD
View
Retailer 6
-
$2,424 AUD
$1,703 USD
View
Price last confirmed 18 days ago
A
Retailer 7
-
$2,540 AUD
$1,784 USD
View
Final sale: no returns
A
Retailer 8
-
$2,901 AUD
$2,038 USD
View
A
Retailer 9
-
$2,919 AUD
£1,615 GBP
View
Retailer 10
-
$3,223 AUD
€2,156 EUR
View
Price last confirmed 7 days ago
A
Retailer 11
-
$3,801 AUD
$2,670 USD
View
A
Retailer 12
-
$3,885 AUD
$2,729 USD
View
A
Retailer 13
-
$4,516 AUD
$3,172 USD
View
Retailer 14
-
$4,587 AUD
View
Price last confirmed 8 days ago
A
Retailer 15
-
$4,708 AUD
ZAR 53,432 ZAR
View
A
Retailer 16
-
$4,903 AUD
£2,712 GBP
View
B+
Retailer 17
-
$5,618 AUD
$3,946 USD
View
B+
Retailer 18
-
$6,523 AUD
£3,608 GBP
View
B+
Retailer 19
-
$7,110 AUD
$4,994 USD
View
B+
Retailer 20
-
$7,354 AUD
$5,166 USD
View
Retailer 21
-
$8,385 AUD
$5,890 USD
View
Price last confirmed 26 days ago
Retailer 22
-
$10,087 AUD
View
Price last confirmed 22 days ago
Most Expensive
Brilliant Earth
20114891A · Oct 18
$17,453 AUD
$12,260 USD
View
Price last confirmed 12 days ago
22 more retailers have this diamond
Prices start from $1,748 AUDSave up to $5,606 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
$1,748 AUD