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 $978 USD
As of October 30, 2026
Save $7,702 USD (89%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $8,680 USD at Do Amore Diamonds · As of October 30, 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 $978 to $8,680, a $7,702 spread on the same certified stone. Do Amore Diamonds lists it at $8,680. 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
Color
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

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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: $8,680 USD|Low: $978 USD|High: $10,480 USD|Avg: $3,479 USD|-17.2%
Do Amore Diamonds
Retailer 2
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Retailer 12
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Retailer 17
October 31, 2026
Retailer 11$978 USD
Retailer 17$1,085 USD
Retailer 6$1,305 USD
Retailer 10$1,314 USD
Retailer 9$1,374 USD
Retailer 16$1,848 USD
Retailer 3$2,080 USD
Retailer 15$2,346 USD
Retailer 12$2,356 USD
Retailer 2$2,444 USD
Retailer 4$2,942 USD
Retailer 14$3,240 USD
Retailer 13$4,267 USD
Retailer 5$5,405 USD
Retailer 7$6,957 USD
Retailer 8$8,470 USD
Do Amore Diamonds$8,680 USD

35 data points across 17 retailers

17 retailers$978 USD to $8,680 USD

A+
Cheapest Retailer
-
$978 USD
A
Retailer 2
-
$1,085 USD
View
A
Retailer 3
-
$1,305 USD
View
A
Retailer 4
-
$1,314 USD
View
A
Retailer 5
-
$1,374 USD
View
Final sale: no returns
A
Retailer 6
-
$1,848 USD
View
Retailer 7
-
$2,080 USD
€1,981 EUR
View
Price last confirmed 7 days ago
A
Retailer 8
-
$2,346 USD
View
A
Retailer 9
-
$2,356 USD
View
A
Retailer 10
-
$2,444 USD
View
Retailer 11
-
$2,942 USD
A$4,526 AUD
View
Price last confirmed 9 days ago
A
Retailer 12
-
$3,240 USD
View
B+
Retailer 13
-
$4,267 USD
£3,360 GBP
View
Retailer 14
-
$5,405 USD
View
Price last confirmed 9 days ago
Retailer 15
-
$6,957 USD
A$10,703 AUD
View
Price last confirmed 22 days ago
B
Retailer 16
-
$8,470 USD
View
Most Expensive
B
Do Amore Diamonds
27-B48F5ABFF · Oct 30
$8,680 USD
View
16 more retailers have this diamond
Prices start from $978 USDSave up to $7,702 USD

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
$978 USD