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Radiant|Lab Grown|IGI

3.12ct D IF Radiant Lab Grown Diamond

ID • D/IF • IGI LG731557448

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

Certificate IGI LG731557448

Diamond specifications and retailer prices

From $1,392 AUD
$978 USD
As of October 30, 2026
Save $10,965 AUD (89%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $12,357 AUD at Do Amore Diamonds · As of October 31, 2026
View at Do Amore Diamonds

About this 3.12ct lab-grown radiant diamond

This 3.12ct 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 LG731557448 or 731557448. Listed at 17 retailers as of October 30, 2026, with prices from $1,392 to $12,357, a $10,965 spread on the same certified stone. Do Amore Diamonds lists it at $12,357. 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

3.12
Carat
D
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle44.3°
Pavilion angle34.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG731557448
Dimensions10.23 × 7.31 × 4.87 mm
L/W Ratio1.40
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
10.23 mm7.31 mm3.12 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG731557448
Side View
Table 64.0%Crown 44.3°Girdle: Slightly ThickPavilion 34.3°Culet: NoneDepth 66.6%

Caratlytics Score

How it works →
A+
Exceptional
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 30
Current: $12,357 AUD|Low: $1,392 AUD|High: $14,919 AUD|Avg: $4,946 AUD|-17.2%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
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Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
November 1, 2026
Retailer 17$1,392 AUD
Retailer 2$1,515 AUD
Retailer 7$1,858 AUD
Retailer 16$1,871 AUD
Retailer 9$1,956 AUD
Retailer 11$2,581 AUD
Retailer 14$2,909 AUD
Retailer 5$3,340 AUD
Retailer 3$3,354 AUD
Retailer 15$3,479 AUD
Retailer 12$4,024 AUD
Retailer 4$4,612 AUD
Retailer 10$6,044 AUD
Retailer 6$7,695 AUD
Retailer 13$9,782 AUD
Retailer 8$12,058 AUD
Do Amore Diamonds$12,357 AUD

36 data points across 17 retailers

17 retailers$1,392 AUD to $12,357 AUD

A+
Cheapest Retailer
-
$1,392 AUD
$978 USD
A
Retailer 2
-
$1,515 AUD
$1,064 USD
View
A
Retailer 3
-
$1,858 AUD
$1,305 USD
View
A
Retailer 4
-
$1,871 AUD
$1,314 USD
View
A
Retailer 5
-
$1,956 AUD
$1,374 USD
View
Final sale: no returns
A
Retailer 6
-
$2,581 AUD
$1,813 USD
View
A
Retailer 7
-
$2,909 AUD
€1,946 EUR
View
A
Retailer 8
-
$3,340 AUD
$2,346 USD
View
A
Retailer 9
-
$3,354 AUD
$2,356 USD
View
A
Retailer 10
-
$3,479 AUD
$2,444 USD
View
A
Retailer 11
-
$4,024 AUD
View
A
Retailer 12
-
$4,612 AUD
$3,240 USD
View
B+
Retailer 13
-
$6,044 AUD
£3,343 GBP
View
Retailer 14
-
$7,695 AUD
$5,405 USD
View
Price last confirmed 11 days ago
B
Retailer 15
-
$9,782 AUD
View
B
Retailer 16
-
$12,058 AUD
$8,470 USD
View
Most Expensive
B
Do Amore Diamonds
27-B48F5ABFF · Oct 31
$12,357 AUD
$8,680 USD
View
16 more retailers have this diamond
Prices start from $1,392 AUDSave up to $10,965 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+
3.12ct Radiant
$1,392 AUD