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Round|Lab Grown|IGI

1.70ct K SI1 Round Lab Grown Diamond

ID • K/SI1 • IGI LG451055650

Shape and cutting style on the report: Round brilliant

Certificate IGI LG451055650

Diamond specifications and retailer prices

From $1,535 AUD
As of November 5, 2026
Save $4,503 AUD (75%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $6,039 AUD at MOH London · As of November 3, 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 K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG451055650 or 451055650. Listed at 9 retailers as of November 3, 2026, with prices from $1,535 to $6,039, a $4,503 spread on the same certified stone. MOH London lists it at $6,039. 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
K
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.8°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG451055650
Dimensions7.67 × 7.70 × 4.71 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
7.67 mm7.70 mm1.70 ctK / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG451055650
Side View
Table 54.0%Crown 34.8°Girdle: MED-STKPavilion 40.2°Culet: NoneDepth 61.3%

Caratlytics Score

How it works →
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: Nov 5
Current: $6,039 AUD|Low: $1,535 AUD|High: $6,120 AUD|Avg: $3,272 AUD
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 3, 2026
Retailer 3$1,535 AUD
Retailer 4$1,780 AUD
Retailer 2$2,038 AUD
Retailer 7$2,580 AUD
Retailer 5$2,839 AUD
Retailer 6$3,721 AUD
MOH London$6,039 AUD

15 data points across 7 retailers

9 retailers$1,535 AUD to $6,039 AUD

A
Cheapest Retailer
-
$1,535 AUD
A
Retailer 2
-
$1,671 AUD
View
Retailer 3
-
$1,780 AUD
View
Price last confirmed 25 days ago
A
Retailer 4
-
$1,780 AUD
View
B+
Retailer 5
-
$2,038 AUD
View
B+
Retailer 6
-
$2,839 AUD
View
B
Retailer 7
-
$3,337 AUD
View
B
Retailer 8
-
$3,721 AUD
View
Most Expensive
B
MOH London
LG451055650 · Nov 3
$6,039 AUD
£3,267 GBP
View
8 more retailers have this diamond
Prices start from $1,535 AUDSave up to $4,503 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
$1,535 AUD