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Round|Lab Grown|IGI

1.70ct I SI2 Round Lab Grown Diamond

EX • I/SI2 • IGI LG451055404

Shape and cutting style on the report: Round brilliant

Certificate IGI LG451055404

Diamond specifications and retailer prices

From $1,352 AUD
$950 USD
As of October 30, 2026
Save $5,227 AUD (79%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $6,579 AUD at MOH London · As of October 29, 2026
View at MOH London

About this 1.7ct lab-grown round diamond

This 1.7ct lab-grown round sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG451055404 or 451055404. Listed at 10 retailers as of October 29, 2026, with prices from $1,352 to $6,579, a $5,227 spread on the same certified stone. MOH London lists it at $6,579. 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

1.70
Carat
I
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG451055404
Dimensions7.82 × 7.83 × 4.58 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
7.82 mm7.83 mm1.70 ctI / SI2
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG451055404
Side View
Table 60.0%Crown 32°GirdlePavilion 40.6°Culet: NoneDepth 58.6%

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 30
Current: $6,579 AUD|Low: $1,352 AUD|High: $6,623 AUD|Avg: $3,334 AUD|+0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 30, 2026
Retailer 2$1,352 AUD
Retailer 4$1,976 AUD
Retailer 7$2,150 AUD
Retailer 9$2,212 AUD
Retailer 5$2,292 AUD
Retailer 11$3,142 AUD
Retailer 6$3,619 AUD
Retailer 10$4,158 AUD
Retailer 8$4,295 AUD
Retailer 3$5,130 AUD
MOH London$6,579 AUD

13 data points across 11 retailers

10 retailers$1,352 AUD to $6,579 AUD

A
Cheapest Retailer
-
$1,352 AUD
$950 USD
B+
Retailer 2
-
$1,976 AUD
$1,388 USD
View
B+
Retailer 3
-
$2,150 AUD
$1,510 USD
View
B+
Retailer 4
-
$2,212 AUD
$1,554 USD
View
Final sale: no returns
Retailer 5
-
$2,292 AUD
$1,610 USD
View
Price last confirmed 18 days ago
B+
Retailer 6
-
$2,292 AUD
$1,610 USD
View
B
Retailer 7
-
$3,619 AUD
$2,542 USD
View
B
Retailer 8
-
$4,158 AUD
$2,921 USD
View
B
Retailer 9
-
$4,295 AUD
$3,017 USD
View
Most Expensive
B
MOH London
LG451055404 · Oct 29
$6,579 AUD
£3,639 GBP
View
9 more retailers have this diamond
Prices start from $1,352 AUDSave up to $5,227 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
1.70ct Round
$1,352 AUD