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Radiant|Lab Grown|IGI

1.68ct E IF Radiant Lab Grown Diamond

ID • E/IF • IGI LG603358509

Certificate IGI LG603358509

Diamond specifications and retailer prices

From $900 AUD
$632 USD
As of October 28, 2026
Save $4,595 AUD (84%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $5,494 AUD at Brilliant Earth · As of October 8, 2026
View at Brilliant Earth

About this 1.68ct lab-grown radiant diamond

This 1.68ct lab-grown radiant sits in the one-and-a-half to two carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG603358509 or 603358509. Listed at 5 retailers as of October 28, 2026, with a 511% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.68
Carat
E
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabIGI
CertificateIGI LG603358509
Dimensions8.59 × 5.85 × 3.84 mm
L/W Ratio1.47
Top View
8.59 mm5.85 mm1.68 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG603358509
Side View
Table 60.0%CrownGirdle: MediumPavilionCulet: NoneDepth 65.6%

Caratlytics Score

How it works →
A
Excellent
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 28
Current: $5,494 AUD|Low: $638 AUD|High: $5,665 AUD|Avg: $2,452 AUD|-3.0%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 23, 2026
Retailer 7$638 AUD
Retailer 4$900 AUD
Retailer 2$1,169 AUD
Retailer 3$1,628 AUD
Retailer 6$2,193 AUD
Retailer 9$2,501 AUD
Retailer 5$2,545 AUD
Retailer 8$2,768 AUD
Retailer 10$4,810 AUD
Brilliant Earth$5,494 AUD

12 data points across 10 retailers

5 retailers$900 AUD to $5,494 AUD

A
Cheapest Retailer
-
$900 AUD
$632 USD
A
Retailer 2
-
$1,169 AUD
€782 EUR
View
B+
Retailer 3
-
$1,628 AUD
$1,144 USD
View
B
Retailer 4
-
$5,494 AUD
$3,860 USD
View
Most Expensive
Brilliant Earth
21385459A · Oct 8
$5,494 AUD
$3,860 USD
View
Price last confirmed 21 days ago
4 more retailers have this diamond
Prices start from $900 AUDSave up to $4,595 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 Radiant
$900 AUD