CaratHunter
Plans
Round|Lab Grown|IGI

1.70ct I SI2 Round Lab Grown Diamond

EX • I/SI2 • IGI LG451057448

Shape and cutting style on the report: Round brilliant

Certificate IGI LG451057448

Diamond specifications and retailer prices

From $1,686 NZD
$950 USD
As of October 31, 2026
Save $6,514 NZD (79%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $8,200 NZD 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 LG451057448 or 451057448. Listed at 10 retailers as of October 29, 2026, with prices from $1,686 to $8,200, a $6,514 spread on the same certified stone. MOH London lists it at $8,200. 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 angle31.9°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG451057448
Dimensions7.73 × 7.78 × 4.57 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
undefined
Top View
7.73 mm7.78 mm1.70 ctI / SI2
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG451057448
Side View
Table 60.0%Crown 31.9°Girdle: MED-STKPavilion 40.2°Culet: NoneDepth 58.8%

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 31
Current: $8,200 NZD|Low: $1,686 NZD|High: $8,254 NZD|Avg: $4,175 NZD|+0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 30, 2026
Retailer 2$1,686 NZD
Retailer 3$2,463 NZD
Retailer 6$2,757 NZD
Retailer 4$2,857 NZD
Retailer 7$2,857 NZD
Retailer 9$3,916 NZD
Retailer 5$4,510 NZD
Retailer 8$5,183 NZD
Retailer 10$6,394 NZD
MOH London$8,200 NZD

13 data points across 10 retailers

10 retailers$1,686 NZD to $8,200 NZD

A
Cheapest Retailer
-
$1,686 NZD
$950 USD
B+
Retailer 2
-
$2,463 NZD
$1,388 USD
View
B+
Retailer 3
-
$2,679 NZD
$1,510 USD
View
B+
Retailer 4
-
$2,757 NZD
$1,554 USD
View
Final sale: no returns
B+
Retailer 5
-
$2,857 NZD
$1,610 USD
View
Retailer 6
-
$2,857 NZD
$1,610 USD
View
Price last confirmed 19 days ago
B
Retailer 7
-
$4,510 NZD
$2,542 USD
View
B
Retailer 8
-
$5,183 NZD
$2,921 USD
View
B
Retailer 9
-
$5,353 NZD
$3,017 USD
View
Most Expensive
B
MOH London
LG451057448 · Oct 29
$8,200 NZD
£3,639 GBP
View
9 more retailers have this diamond
Prices start from $1,686 NZDSave up to $6,514 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.

A
1.70ct Round
$1,686 NZD