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Radiant|Lab Grown|IGI

3.15ct D IF Radiant Lab Grown Diamond

ID • D/IF • IGI LG745508340

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

Certificate IGI LG745508340

Diamond specifications and retailer prices

From $1,385 AUD
$973 USD
As of October 30, 2026
Save $10,915 AUD (89%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $12,300 AUD at Do Amore Diamonds · As of October 31, 2026
View at Do Amore Diamonds

About this 3.15ct lab-grown radiant diamond

This 3.15ct 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 LG745508340 or 745508340. Listed at 14 retailers as of October 30, 2026, with prices from $1,385 to $12,300, a $10,915 spread on the same certified stone. Do Amore Diamonds lists it at $12,300. 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

3.15
Carat
D
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.5°
Pavilion angle35.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG745508340
Dimensions9.88 × 7.20 × 4.98 mm
L/W Ratio1.37
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
9.88 mm7.20 mm3.15 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG745508340
Side View
Table 62.0%Crown 42.5°Girdle: STK-THKPavilion 35.3°Culet: NoneDepth 69.2%

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: $12,300 AUD|Low: $1,385 AUD|High: $14,151 AUD|Avg: $5,122 AUD|-13.1%
Do Amore Diamonds
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
October 31, 2026
Retailer 9$1,385 AUD
Retailer 12$1,540 AUD
Retailer 6$1,943 AUD
Retailer 8$2,017 AUD
Retailer 13$2,625 AUD
Retailer 2$2,627 AUD
Retailer 7$3,385 AUD
Retailer 11$3,398 AUD
Retailer 14$4,144 AUD
Retailer 4$4,799 AUD
Retailer 10$6,181 AUD
Retailer 3$7,773 AUD
Retailer 5$11,659 AUD
Do Amore Diamonds$12,300 AUD

32 data points across 14 retailers

14 retailers$1,385 AUD to $12,300 AUD

A+
Cheapest Retailer
-
$1,385 AUD
$973 USD
A
Retailer 2
-
$1,540 AUD
$1,082 USD
View
A
Retailer 3
-
$1,943 AUD
$1,365 USD
View
Final sale: no returns
A
Retailer 4
-
$2,017 AUD
$1,417 USD
View
A
Retailer 5
-
$2,625 AUD
$1,844 USD
View
A
Retailer 6
-
$2,627 AUD
$1,845 USD
View
A
Retailer 7
-
$3,385 AUD
$2,378 USD
View
A
Retailer 8
-
$3,398 AUD
$2,387 USD
View
Retailer 9
-
$4,144 AUD
View
Price last confirmed 9 days ago
A
Retailer 10
-
$4,799 AUD
$3,371 USD
View
B+
Retailer 11
-
$6,181 AUD
£3,419 GBP
View
Retailer 12
-
$7,773 AUD
$5,460 USD
View
Price last confirmed 12 days ago
B
Retailer 13
-
$11,659 AUD
$8,190 USD
View
Most Expensive
B
Do Amore Diamonds
27-34F605E6C · Oct 31
$12,300 AUD
$8,640 USD
View
13 more retailers have this diamond
Prices start from $1,385 AUDSave up to $10,915 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+
3.15ct Radiant
$1,385 AUD