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1.73ct I SI1 Round Lab Grown Diamond

EX • I/SI1 • IGI LG436072357

Shape and cutting style on the report: Round brilliant

Certificate IGI LG436072357

Diamond specifications and retailer prices

From $1,703 NZD
$960 USD
As of October 31, 2026
Save $7,522 NZD (82%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $9,225 NZD at MOH London · As of November 1, 2026
View at MOH London

About this 1.73ct lab-grown round diamond

This 1.73ct lab-grown round sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG436072357 or 436072357. Listed at 11 retailers as of October 31, 2026, with prices from $1,703 to $9,225, a $7,522 spread on the same certified stone. MOH London lists it at $9,225. 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

1.73
Carat
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle31.6°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG436072357
Dimensions7.86 × 7.84 × 4.59 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
7.86 mm7.84 mm1.73 ctI / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG436072357
Side View
Table 59.0%Crown 31.6°Girdle: MED-STKPavilion 40.3°Culet: NoneDepth 58.5%

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: $9,225 NZD|Low: $1,703 NZD|High: $9,349 NZD|Avg: $4,403 NZD
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 1, 2026
Retailer 2$1,703 NZD
Retailer 4$2,786 NZD
Retailer 7$3,119 NZD
Retailer 5$3,231 NZD
Retailer 10$3,391 NZD
Retailer 8$3,531 NZD
Retailer 9$4,363 NZD
Retailer 6$5,085 NZD
Retailer 3$5,713 NZD
MOH London$9,225 NZD

17 data points across 10 retailers

11 retailers$1,703 NZD to $9,225 NZD

A
Cheapest Retailer
-
$1,703 NZD
$960 USD
B+
Retailer 2
-
$2,786 NZD
$1,570 USD
View
B+
Retailer 3
-
$3,031 NZD
$1,708 USD
View
B+
Retailer 4
-
$3,119 NZD
$1,758 USD
View
Final sale: no returns
B+
Retailer 5
-
$3,231 NZD
$1,821 USD
View
Retailer 6
-
$3,231 NZD
$1,821 USD
View
Price last confirmed 20 days ago
B+
Retailer 7
-
$3,531 NZD
$1,990 USD
View
B
Retailer 8
-
$5,085 NZD
$2,866 USD
View
B
Retailer 9
-
$5,713 NZD
$3,220 USD
View
B
Retailer 10
-
$6,056 NZD
$3,413 USD
View
Most Expensive
B
MOH London
LG436072357 · Nov 1
$9,225 NZD
£4,094 GBP
View
10 more retailers have this diamond
Prices start from $1,703 NZDSave up to $7,522 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
1.73ct Round
$1,703 NZD