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Marquise|Lab Grown|IGI

3.12ct D IF Marquise Lab Grown Diamond

EX • D/IF • IGI LG839684893

Shape and cutting style on the report: Hexagonal modified brilliant

Certificate IGI LG839684893

Diamond specifications and retailer prices

From $3,780 AUD
$2,655 USD
As of October 31, 2026
Save $16,350 AUD (81%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $20,130 AUD at Do Amore Diamonds · As of October 31, 2026
View at Do Amore Diamonds

About this 3.12ct lab-grown marquise diamond

This 3.12ct lab-grown marquise 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 LG839684893 or 839684893. Listed at 8 retailers as of October 31, 2026, with prices from $3,780 to $20,130, a $16,350 spread on the same certified stone. Do Amore Diamonds lists it at $20,130. 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
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.4°
Pavilion angle35.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG839684893
Dimensions13.89 × 7.19 × 4.68 mm
L/W Ratio1.93
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
13.89 mm7.19 mm3.12 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG839684893
Side View
Table 62.0%Crown 35.4°Girdle: MED-STKPavilion 35.5°Culet: NoneDepth 65.1%

Caratlytics Score

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A
Excellent
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 31
Current: $20,130 AUD|Low: $3,780 AUD|High: $20,130 AUD|Avg: $9,096 AUD
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 1, 2026
Retailer 6$3,780 AUD
Retailer 4$3,986 AUD
Retailer 8$5,922 AUD
Retailer 7$10,983 AUD
Retailer 2$11,096 AUD
Retailer 3$12,600 AUD
Retailer 5$14,460 AUD
Do Amore Diamonds$20,130 AUD

9 data points across 8 retailers

8 retailers$3,780 AUD to $20,130 AUD

A
Cheapest Retailer
-
$3,780 AUD
$2,655 USD
Final sale: no returns
A
Retailer 2
-
$3,986 AUD
$2,800 USD
View
A
Retailer 3
-
$5,922 AUD
$4,160 USD
View
B+
Retailer 4
-
$10,983 AUD
$7,715 USD
View
B+
Retailer 5
-
$11,096 AUD
£6,137 GBP
View
B+
Retailer 6
-
$12,600 AUD
£6,969 GBP
View
B
Retailer 7
-
$14,460 AUD
$10,158 USD
View
Most Expensive
B
Do Amore Diamonds
20-E103545 · Oct 31
$20,130 AUD
$14,140 USD
View
7 more retailers have this diamond
Prices start from $3,780 AUDSave up to $16,350 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 Marquise
$3,780 AUD