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Round|Lab Grown|IGI

1.67ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG764636382

Shape and cutting style on the report: Round brilliant

Certificate IGI LG764636382

Diamond specifications and retailer prices

From $329 AUD
$231 USD
As of October 29, 2026
Save $1,311 AUD (80%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $1,765 AUD at Brilliant Earth · As of October 22, 2026
View at Brilliant Earth

About this 1.67ct lab-grown round diamond

This 1.67ct lab-grown round sits in the one-and-a-half to two carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG764636382 or 764636382. Listed at 17 retailers as of October 29, 2026, with a 399% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.67
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.2°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG764636382
Dimensions7.63 × 7.65 × 4.68 mm
L/W Ratio1.00
Girdle conditionFaceted
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
7.63 mm7.65 mm1.67 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG764636382
Side View
Table 58.0%Crown 34.2°Girdle: MED-STKPavilion 40.9°Culet: NoneDepth 61.2%

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 29
Current: $1,765 AUD|Low: $315 AUD|High: $1,808 AUD|Avg: $787 AUD|-2.4%
Brilliant Earth
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 29, 2026
Retailer 13$329 AUD
Retailer 3$367 AUD
Retailer 5$380 AUD
Retailer 14$407 AUD
Retailer 12$548 AUD
Retailer 9$674 AUD
Retailer 8$706 AUD
Retailer 2$763 AUD
Retailer 4$776 AUD
Retailer 11$1,039 AUD
Retailer 10$1,053 AUD
Retailer 6$1,308 AUD
Retailer 7$1,640 AUD
Brilliant Earth$1,765 AUD

43 data points across 14 retailers

17 retailers$329 AUD to $1,640 AUD

A
Cheapest Retailer
-
$329 AUD
$231 USD
A
Retailer 2
-
$367 AUD
$258 USD
View
Final sale: no returns
A
Retailer 3
-
$380 AUD
$267 USD
View
A
Retailer 4
-
$407 AUD
$286 USD
View
A
Retailer 5
-
$407 AUD
$286 USD
View
B+
Retailer 6
-
$548 AUD
$385 USD
View
A
Retailer 7
-
$674 AUD
€451 EUR
View
A
Retailer 8
-
$706 AUD
£391 GBP
View
A
Retailer 9
-
$725 AUD
$509 USD
View
A
Retailer 10
-
$763 AUD
£422 GBP
View
B+
Retailer 11
-
$776 AUD
$545 USD
View
B+
Retailer 12
-
$1,039 AUD
$730 USD
View
Retailer 13
-
$1,053 AUD
$740 USD
View
Price last confirmed 11 days ago
B
Retailer 14
-
$1,308 AUD
$919 USD
View
B
Retailer 15
-
$1,383 AUD
$972 USD
View
B
Retailer 16
-
$1,640 AUD
£907 GBP
View
Most Expensive
Brilliant Earth
21313425A · Oct 22
$1,765 AUD
$1,240 USD
View
Price last confirmed 7 days ago
16 more retailers have this diamond
Prices start from $329 AUDSave up to $1,311 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
1.67ct Round
$329 AUD