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Round|Lab Grown|IGI

1.68ct D IF Round Lab Grown Diamond

ID • D/IF • IGI LG780668507

Shape and cutting style on the report: Round brilliant

Certificate IGI LG780668507

Diamond specifications and retailer prices

From $900 AUD
$632 USD
As of October 30, 2026
Save $2,581 AUD (74%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $3,481 AUD at Rare Carat · As of October 25, 2026
View at Rare Carat

About this 1.68ct lab-grown round diamond

This 1.68ct lab-grown round sits in the one-and-a-half to two carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG780668507 or 780668507. Listed at 8 retailers as of October 25, 2026, with prices from $900 to $3,481, a $2,581 spread on the same certified stone. Rare Carat lists it at $3,481. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.68
Carat
D
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.1°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG780668507
Dimensions7.71 × 7.67 × 4.68 mm
L/W Ratio1.01
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
7.71 mm7.67 mm1.68 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG780668507
Side View
Table 57.0%Crown 34.1°Girdle: MediumPavilion 40.7°Culet: NoneDepth 60.8%

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 30
Current: $3,481 AUD|Low: $900 AUD|High: $3,552 AUD|Avg: $1,874 AUD|-2.0%
Rare Carat
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 1, 2026
Retailer 6$900 AUD
Retailer 4$1,031 AUD
Retailer 2$1,152 AUD
Retailer 3$1,583 AUD
Retailer 7$1,673 AUD
Retailer 8$2,116 AUD
Retailer 5$2,515 AUD
Rare Carat$3,481 AUD

38 data points across 8 retailers

8 retailers$900 AUD to $3,481 AUD

A
Cheapest Retailer
-
$900 AUD
$632 USD
A
Retailer 2
-
$1,031 AUD
€690 EUR
View
A
Retailer 3
-
$1,152 AUD
£637 GBP
View
B+
Retailer 4
-
$1,583 AUD
$1,112 USD
View
B+
Retailer 5
-
$1,673 AUD
$1,175 USD
View
B+
Retailer 6
-
$2,116 AUD
$1,486 USD
View
B+
Retailer 7
-
$2,515 AUD
£1,391 GBP
View
Most Expensive
B
Rare Carat
C91-4A · Oct 25
$3,481 AUD
$2,445 USD
View
7 more retailers have this diamond
Prices start from $900 AUDSave up to $2,581 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
1.68ct Round
$900 AUD