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Round|Lab Grown|IGI

1.70ct I SI2 Round Lab Grown Diamond

VG • I/SI2 • IGI LG451055512

Shape and cutting style on the report: Round brilliant

Certificate IGI LG451055512

Diamond specifications and retailer prices

From $1,367 AUD
$960 USD
As of October 30, 2026
Save $5,213 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 very-good cut grade and certified by IGI LG451055512 or 451055512. Listed at 10 retailers as of October 29, 2026, with prices from $1,367 to $6,579, a $5,213 spread on the same certified stone. MOH London lists it at $6,579. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.70
Carat
I
Colour
SI2
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle31.7°
Pavilion angle41.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG451055512
Dimensions7.72 × 7.69 × 4.62 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
7.72 mm7.69 mm1.70 ctI / SI2
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG451055512
Side View
Table 62.5%Crown 31.7°Girdle: MED-STKPavilion 41.3°Culet: NoneDepth 59.9%

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: $1,367 AUD|High: $6,632 AUD|Avg: $3,272 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
Retailer 12
October 30, 2026
Retailer 2$1,367 AUD
Retailer 5$1,976 AUD
Retailer 8$2,150 AUD
Retailer 10$2,212 AUD
Retailer 6$2,292 AUD
Retailer 3$2,571 AUD
Retailer 12$3,142 AUD
Retailer 7$3,619 AUD
Retailer 11$4,158 AUD
Retailer 9$4,295 AUD
Retailer 4$5,130 AUD
MOH London$6,579 AUD

16 data points across 12 retailers

10 retailers$1,367 AUD to $6,579 AUD

A
Cheapest Retailer
-
$1,367 AUD
$960 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
B+
Retailer 5
-
$2,292 AUD
$1,610 USD
View
Retailer 6
-
$2,292 AUD
$1,610 USD
View
Price last confirmed 18 days ago
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
LG451055512 · Oct 29
$6,579 AUD
£3,639 GBP
View
9 more retailers have this diamond
Prices start from $1,367 AUDSave up to $5,213 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
$1,367 AUD