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Round|Lab Grown|IGI

1.70ct I SI2 Round Lab Grown Diamond

EX • I/SI2 • IGI LG451055404

Shape and cutting style on the report: Round brilliant

Certificate IGI LG451055404

Diamond specifications and retailer prices

From $950 USD
As of October 30, 2026
Save $3,672 USD (79%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $4,622 USD 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 LG451055404 or 451055404. Listed at 10 retailers as of October 29, 2026, with prices from $950 to $4,622, a $3,672 spread on the same certified stone. MOH London lists it at $4,622. 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
Color
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG451055404
Dimensions7.82 × 7.83 × 4.58 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
7.82 mm7.83 mm1.70 ctI / SI2
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG451055404
Side View
Table 60.0%Crown 32°GirdlePavilion 40.6°Culet: NoneDepth 58.6%

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: $4,622 USD|Low: $950 USD|High: $4,652 USD|Avg: $2,497 USD|+0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 30, 2026
Retailer 2$950 USD
Retailer 4$1,510 USD
Retailer 5$1,554 USD
Retailer 7$2,207 USD
Retailer 3$2,542 USD
Retailer 6$2,921 USD
Retailer 8$3,604 USD
MOH London$4,622 USD

10 data points across 8 retailers

10 retailers$950 USD to $4,622 USD

A
Cheapest Retailer
-
$950 USD
B+
Retailer 2
-
$1,388 USD
View
B+
Retailer 3
-
$1,510 USD
View
B+
Retailer 4
-
$1,554 USD
View
Final sale: no returns
Retailer 5
-
$1,610 USD
View
Price last confirmed 17 days ago
B+
Retailer 6
-
$1,610 USD
View
B
Retailer 7
-
$2,542 USD
View
B
Retailer 8
-
$2,921 USD
View
B
Retailer 9
-
$3,017 USD
View
Most Expensive
B
MOH London
LG451055404 · Oct 29
$4,622 USD
£3,639 GBP
View
9 more retailers have this diamond
Prices start from $950 USDSave up to $3,672 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
1.70ct Round
$950 USD