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Round|Lab Grown|IGI

1.70ct J SI1 Round Lab Grown Diamond

EX • J/SI1 • IGI LG480150391

Shape and cutting style on the report: Round brilliant

Certificate IGI LG480150391

Diamond specifications and retailer prices

From $1,706 NZD
$960 USD
As of October 30, 2026
Save $7,031 NZD (80%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $8,738 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 J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG480150391 or 480150391. Listed at 12 retailers as of October 29, 2026, with prices from $1,706 to $8,738, a $7,031 spread on the same certified stone. MOH London lists it at $8,738. 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
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32°
Pavilion angle40.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG480150391
Dimensions7.84 × 7.86 × 4.56 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
7.84 mm7.86 mm1.70 ctJ / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG480150391
Side View
Table 59.0%Crown 32°Girdle: THN-MEDPavilion 40.1°Culet: NoneDepth 58.2%

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: $8,738 NZD|Low: $1,706 NZD|High: $8,796 NZD|Avg: $3,673 NZD|-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
Retailer 13
November 1, 2026
Retailer 6$1,706 NZD
Retailer 8$2,332 NZD
Retailer 12$2,538 NZD
Retailer 11$2,613 NZD
Retailer 3$2,705 NZD
Retailer 9$2,705 NZD
Retailer 7$3,013 NZD
Retailer 2$3,541 NZD
Retailer 5$3,738 NZD
Retailer 10$4,280 NZD
Retailer 4$5,042 NZD
Retailer 13$5,071 NZD
MOH London$8,738 NZD

25 data points across 13 retailers

12 retailers$1,706 NZD to $8,738 NZD

A
Cheapest Retailer
-
$1,706 NZD
$960 USD
B+
Retailer 2
-
$2,332 NZD
$1,312 USD
View
B+
Retailer 3
-
$2,538 NZD
$1,428 USD
View
B+
Retailer 4
-
$2,613 NZD
$1,470 USD
View
Final sale: no returns
Retailer 5
-
$2,705 NZD
$1,522 USD
View
Price last confirmed 20 days ago
B+
Retailer 6
-
$2,705 NZD
$1,522 USD
View
B+
Retailer 7
-
$3,013 NZD
$1,695 USD
View
B+
Retailer 8
-
$3,541 NZD
£1,569 GBP
View
B
Retailer 9
-
$4,280 NZD
$2,408 USD
View
B
Retailer 10
-
$5,042 NZD
$2,837 USD
View
B
Retailer 11
-
$5,071 NZD
$2,853 USD
View
Most Expensive
B
MOH London
LG480150391 · Oct 29
$8,738 NZD
£3,871 GBP
View
11 more retailers have this diamond
Prices start from $1,706 NZDSave up to $7,031 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
$1,706 NZD