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Round|Lab Grown|IGI

1.70ct K SI1 Round Lab Grown Diamond

VG • K/SI1 • IGI LG451055622

Shape and cutting style on the report: Round brilliant

Certificate IGI LG451055622

Diamond specifications and retailer prices

From $1,903 NZD
As of November 5, 2026
Save $5,581 NZD (75%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $7,485 NZD at MOH London · As of November 1, 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 very-good cut grade and certified by IGI LG451055622 or 451055622. Listed at 9 retailers as of November 1, 2026, with prices from $1,903 to $7,485, a $5,581 spread on the same certified stone. MOH London lists it at $7,485. 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
K
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle31.8°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG451055622
Dimensions7.64 × 7.74 × 4.54 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
7.64 mm7.74 mm1.70 ctK / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG451055622
Side View
Table 63.0%Crown 31.8°Girdle: STK-THKPavilion 40.4°Culet: NoneDepth 58.9%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: $7,485 NZD|Low: $1,903 NZD|High: $7,574 NZD|Avg: $4,147 NZD
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 1, 2026
Retailer 3$1,903 NZD
Retailer 4$2,206 NZD
Retailer 2$2,525 NZD
Retailer 7$3,198 NZD
Retailer 5$3,519 NZD
Retailer 6$4,613 NZD
Retailer 8$6,315 NZD
MOH London$7,485 NZD

15 data points across 8 retailers

9 retailers$1,903 NZD to $7,485 NZD

B+
Cheapest Retailer
-
$1,903 NZD
B+
Retailer 2
-
$2,071 NZD
View
Retailer 3
-
$2,206 NZD
View
Price last confirmed 25 days ago
B+
Retailer 4
-
$2,206 NZD
View
B+
Retailer 5
-
$2,525 NZD
View
B
Retailer 6
-
$3,519 NZD
View
B
Retailer 7
-
$4,136 NZD
View
B
Retailer 8
-
$4,613 NZD
View
Most Expensive
C
MOH London
LG451055622 · Nov 1
$7,485 NZD
£3,267 GBP
View
8 more retailers have this diamond
Prices start from $1,903 NZDSave up to $5,581 NZD

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.

B+
1.70ct Round
$1,903 NZD