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1.72ct J SI1 Round Lab Grown Diamond

EX • J/SI1 • IGI LG451055604

Shape and cutting style on the report: Round brilliant

Certificate IGI LG451055604

Diamond specifications and retailer prices

From $970 USD
As of October 31, 2026
Save $3,977 USD (80%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $4,947 USD at MOH London · As of November 1, 2026
View at MOH London

About this 1.72ct lab-grown round diamond

This 1.72ct 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 LG451055604 or 451055604. Listed at 11 retailers as of October 31, 2026, with prices from $970 to $4,947, a $3,977 spread on the same certified stone. MOH London lists it at $4,947. 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

1.72
Carat
J
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG451055604
Dimensions7.83 × 7.84 × 4.55 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
7.83 mm7.84 mm1.72 ctJ / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG451055604
Side View
Table 62.0%Crown 32°Girdle: MED-STKPavilion 40.3°Culet: NoneDepth 58.1%

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: Oct 31
Current: $4,947 USD|Low: $970 USD|High: $5,006 USD|Avg: $2,338 USD|-1.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 1, 2026
Retailer 2$970 USD
Retailer 4$1,327 USD
Retailer 7$1,485 USD
Retailer 5$1,540 USD
Retailer 8$1,540 USD
Retailer 9$1,710 USD
Retailer 11$2,124 USD
Retailer 6$2,435 USD
Retailer 10$2,870 USD
Retailer 3$4,406 USD
MOH London$4,947 USD

12 data points across 11 retailers

11 retailers$970 USD to $4,947 USD

A
Cheapest Retailer
-
$970 USD
B+
Retailer 2
-
$1,327 USD
View
B+
Retailer 3
-
$1,444 USD
View
B+
Retailer 4
-
$1,485 USD
View
Final sale: no returns
Retailer 5
-
$1,540 USD
View
Price last confirmed 19 days ago
B+
Retailer 6
-
$1,540 USD
View
B+
Retailer 7
-
$1,710 USD
View
B
Retailer 8
-
$2,435 USD
View
B
Retailer 9
-
$2,870 USD
View
B
Retailer 10
-
$2,886 USD
View
Most Expensive
B
MOH London
LG451055604 · Nov 1
$4,947 USD
£3,895 GBP
View
10 more retailers have this diamond
Prices start from $970 USDSave up to $3,977 USD

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
1.72ct Round
$970 USD