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Oval|Lab Grown|IGI

3.12ct D IF Oval Lab Grown Diamond

ID • D/IF • IGI LG844664145

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG844664145

Diamond specifications and retailer prices

From $1,311 AUD
$921 USD
As of October 29, 2026
Save $11,329 AUD (90%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $12,640 AUD at Blue Nile · As of October 29, 2026
View at Blue Nile

About this 3.12ct lab-grown oval diamond

This 3.12ct lab-grown oval 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 LG844664145 or 844664145. Listed at 16 retailers as of October 29, 2026, with prices from $1,311 to $12,640, a $11,329 spread on the same certified stone. Blue Nile lists it at $12,640. 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 angle33.4°
Pavilion angle40°
OriginLab Grown
Grading LabIGI
CertificateIGI LG844664145
Dimensions11.70 × 8.33 × 5.03 mm
L/W Ratio1.40
Girdle conditionFaceted
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
11.70 mm8.33 mm3.12 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG844664145
Side View
Table 60.0%Crown 33.4°Girdle: MED-STKPavilion 40°Culet: NoneDepth 60.4%

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 29
Current: $12,640 AUD|Low: $1,311 AUD|High: $20,728 AUD|Avg: $5,487 AUD
Blue Nile
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
Retailer 15
Retailer 16
Retailer 17
Retailer 18
October 30, 2026
Retailer 4$1,311 AUD
Retailer 18$1,426 AUD
Retailer 13$1,784 AUD
Retailer 16$1,836 AUD
Retailer 11$2,004 AUD
Retailer 5$2,439 AUD
Retailer 9$2,818 AUD
Retailer 14$3,148 AUD
Retailer 17$3,334 AUD
Retailer 6$3,343 AUD
Retailer 7$3,938 AUD
Retailer 3$4,335 AUD
Retailer 12$5,726 AUD
Retailer 10$6,899 AUD
Retailer 8$7,766 AUD
Retailer 15$11,645 AUD
Retailer 2$12,029 AUD
Blue Nile$12,640 AUD

15 data points across 18 retailers

16 retailers$1,311 AUD to $12,640 AUD

A+
Cheapest Retailer
-
$1,311 AUD
$921 USD
A
Retailer 2
-
$1,426 AUD
$1,002 USD
View
A
Retailer 3
-
$1,784 AUD
$1,253 USD
View
A
Retailer 4
-
$1,836 AUD
$1,290 USD
View
A
Retailer 5
-
$2,004 AUD
£1,109 GBP
View
A
Retailer 6
-
$2,439 AUD
$1,713 USD
View
A
Retailer 7
-
$3,148 AUD
$2,211 USD
View
A
Retailer 8
-
$3,334 AUD
$2,342 USD
View
A
Retailer 9
-
$3,343 AUD
$2,348 USD
View
Retailer 10
-
$3,938 AUD
View
Price last confirmed 9 days ago
A
Retailer 11
-
$4,335 AUD
$3,045 USD
View
B+
Retailer 12
-
$5,726 AUD
£3,167 GBP
View
Retailer 13
-
$7,766 AUD
$5,455 USD
View
Price last confirmed 12 days ago
B
Retailer 14
-
$11,645 AUD
$8,180 USD
View
B
Retailer 15
-
$12,029 AUD
$8,450 USD
View
Most Expensive
B
Blue Nile
30390503 · Oct 29
$12,640 AUD
$8,879 USD
View
15 more retailers have this diamond
Prices start from $1,311 AUDSave up to $11,329 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 Oval
$1,311 AUD