CaratHunter
Plans
Round|Lab Grown|IGI

1.65ct G SI1 Round Lab Grown Diamond

ID • G/SI1 • IGI LG12255703

Shape and cutting style on the report: Round brilliant

Certificate IGI LG12255703

Diamond specifications and retailer prices

From $511 AUD
$359 USD
As of November 1, 2026
Save $2,224 AUD (81%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $4,541 AUD at Do Amore Diamonds · As of October 31, 2026
View at Do Amore Diamonds

About this 1.65ct lab-grown round diamond

This 1.65ct lab-grown round sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG12255703 or 12255703. Listed at 20 retailers as of November 1, 2026, with a 435% 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

1.65
Carat
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG12255703
Dimensions7.59 × 7.63 × 4.65 mm
L/W Ratio1.01
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment. Type IIa
Top View
7.59 mm7.63 mm1.65 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG12255703
Side View
Table 59.0%Crown 35.5°Girdle: MED-UNDPavilion 40.9°Culet: NoneDepth 61.1%

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: Nov 1
Current: $4,541 AUD|Low: $511 AUD|High: $4,541 AUD|Avg: $1,449 AUD
Do Amore Diamonds
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
Retailer 19
Retailer 20
November 1, 2026
Retailer 20$511 AUD
Retailer 18$594 AUD
Retailer 16$634 AUD
Retailer 3$635 AUD
Retailer 5$635 AUD
Retailer 17$635 AUD
Retailer 7$847 AUD
Retailer 8$1,018 AUD
Retailer 19$1,110 AUD
Retailer 10$1,127 AUD
Retailer 15$1,136 AUD
Retailer 12$1,238 AUD
Retailer 14$1,247 AUD
Retailer 2$1,338 AUD
Retailer 6$1,861 AUD
Retailer 9$1,973 AUD
Retailer 4$2,251 AUD
Retailer 11$2,469 AUD
Retailer 13$2,735 AUD
Do Amore Diamonds$4,541 AUD

16 data points across 20 retailers

20 retailers$511 AUD to $2,735 AUD

A
Cheapest Retailer
-
$511 AUD
$359 USD
A
Retailer 2
-
$594 AUD
$417 USD
View
B+
Retailer 3
-
$634 AUD
$445 USD
View
Retailer 4
-
$635 AUD
$446 USD
View
Price last confirmed 7 days ago
A
Retailer 5
-
$635 AUD
$446 USD
View
A
Retailer 6
-
$635 AUD
$446 USD
View
B+
Retailer 7
-
$847 AUD
$595 USD
View
Retailer 8
-
$1,018 AUD
$715 USD
View
Price last confirmed 11 days ago
B+
Retailer 9
-
$1,110 AUD
$780 USD
View
B+
Retailer 10
-
$1,127 AUD
$791 USD
View
B+
Retailer 11
-
$1,136 AUD
£628 GBP
View
B+
Retailer 12
-
$1,238 AUD
$869 USD
View
B+
Retailer 13
-
$1,247 AUD
£690 GBP
View
B+
Retailer 14
-
$1,338 AUD
$940 USD
View
B
Retailer 15
-
$1,861 AUD
$1,307 USD
View
B
Retailer 16
-
$1,973 AUD
$1,386 USD
View
B
Retailer 17
-
$2,251 AUD
$1,581 USD
View
B
Retailer 18
-
$2,469 AUD
$1,734 USD
View
B
Retailer 19
-
$2,735 AUD
£1,513 GBP
View
Most Expensive
Do Amore Diamonds
27-7EBE39188 · Oct 31
$4,541 AUD
$3,190 USD
View
Price under review
19 more retailers have this diamond
Prices start from $511 AUDSave up to $2,224 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
1.65ct Round
$511 AUD