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Round|Lab Grown|IGI

1.74ct E SI1 Round Lab Grown Diamond

EX • E/SI1 • IGI LG591310801

Shape and cutting style on the report: Round brilliant

Certificate IGI LG591310801

Diamond specifications and retailer prices

From $314 USD
As of October 28, 2026
Save $1,106 USD (78%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $1,420 USD at Brilliant Earth · As of October 28, 2026
View at Brilliant Earth

About this 1.74ct lab-grown round diamond

This 1.74ct lab-grown round sits in the one-and-a-half to two carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG591310801 or 591310801. Listed at 11 retailers as of October 28, 2026, with prices from $314 to $1,420, a $1,106 spread on the same certified stone. Brilliant Earth lists it at $1,420. 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

1.74
Carat
E
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.3°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG591310801
Dimensions7.68 × 7.72 × 4.81 mm
L/W Ratio1.01
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
7.68 mm7.72 mm1.74 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG591310801
Side View
Table 55.0%Crown 36.3°Girdle: MediumPavilion 40.7°Culet: NoneDepth 62.5%

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 28
Current: $1,420 USD|Low: $314 USD|High: $1,810 USD|Avg: $747 USD|+2.9%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 29, 2026
Retailer 4$314 USD
Retailer 9$410 USD
Retailer 8$433 USD
Retailer 3$445 USD
Retailer 6$494 USD
Retailer 10$518 USD
Retailer 2$585 USD
Retailer 7$688 USD
Retailer 12$991 USD
Retailer 11$1,198 USD
Retailer 5$1,242 USD
Brilliant Earth$1,420 USD

39 data points across 12 retailers

11 retailers$314 USD to $1,420 USD

A
Cheapest Retailer
-
$314 USD
Final sale: no returns
A
Retailer 2
-
$410 USD
HK$3,200 HKD
View
A
Retailer 3
-
$433 USD
View
A
Retailer 4
-
$494 USD
€470 EUR
View
A
Retailer 5
-
$518 USD
View
A
Retailer 6
-
$585 USD
£461 GBP
View
B+
Retailer 7
-
$688 USD
A$1,058 AUD
View
B
Retailer 8
-
$991 USD
View
B
Retailer 9
-
$1,198 USD
SGD 1,619 SGD
View
B
Retailer 10
-
$1,242 USD
£978 GBP
View
Most Expensive
B
Brilliant Earth
7790795A · Oct 28
$1,420 USD
View
10 more retailers have this diamond
Prices start from $314 USDSave up to $1,106 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
1.74ct Round
$314 USD