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Round|Lab Grown|IGI

1.58ct H SI1 Round Lab Grown Diamond

EX • H/SI1 • IGI LG12378004

Shape and cutting style on the report: Round brilliant

Certificate IGI LG12378004

Diamond specifications and retailer prices

From $341 USD
As of October 29, 2026
Save $2,689 USD (89%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $3,030 USD at Do Amore Diamonds · As of October 31, 2026
View at Do Amore Diamonds

About this 1.58ct lab-grown round diamond

This 1.58ct lab-grown round sits in the one-and-a-half to two carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG12378004 or 12378004. Listed at 18 retailers as of October 29, 2026, with prices from $341 to $3,030, a $2,689 spread on the same certified stone. Do Amore Diamonds lists it at $3,030. 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

1.58
Carat
H
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle41.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG12378004
Dimensions7.42 × 7.47 × 4.64 mm
L/W Ratio1.01
Cert comments
As Grown - No indications of post-growth treatment. This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process.
Top View
7.42 mm7.47 mm1.58 ctH / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG12378004
Side View
Table 59.0%Crown 35.5°Girdle: MED-UNDPavilion 41.4°Culet: NoneDepth 62.2%

Caratlytics Score

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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 29
Current: $3,030 USD|Low: $341 USD|High: $3,030 USD|Avg: $977 USD
Do Amore Diamonds
Retailer 2
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Retailer 12
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Retailer 18
October 30, 2026
Retailer 17$341 USD
Retailer 14$396 USD
Retailer 2$418 USD
Retailer 5$423 USD
Retailer 13$423 USD
Retailer 18$506 USD
Retailer 6$575 USD
Retailer 7$675 USD
Retailer 9$730 USD
Retailer 11$756 USD
Retailer 15$757 USD
Retailer 10$829 USD
Retailer 16$1,241 USD
Retailer 8$1,277 USD
Retailer 4$1,501 USD
Retailer 3$1,657 USD
Retailer 12$1,834 USD
Do Amore Diamonds$3,030 USD

14 data points across 18 retailers

18 retailers$341 USD to $3,030 USD

A
Cheapest Retailer
-
$341 USD
A
Retailer 2
-
$396 USD
View
B+
Retailer 3
-
$418 USD
View
A
Retailer 4
-
$423 USD
View
A
Retailer 5
-
$423 USD
View
A
Retailer 6
-
$506 USD
View
A
Retailer 7
-
$575 USD
View
Retailer 8
-
$675 USD
View
Price last confirmed 10 days ago
A
Retailer 9
-
$730 USD
View
A
Retailer 10
-
$756 USD
£595 GBP
View
A
Retailer 11
-
$757 USD
View
A
Retailer 12
-
$829 USD
View
A
Retailer 13
-
$1,241 USD
View
A
Retailer 14
-
$1,277 USD
View
B+
Retailer 15
-
$1,501 USD
View
B+
Retailer 16
-
$1,657 USD
View
B+
Retailer 17
-
$1,834 USD
£1,444 GBP
View
Most Expensive
B
Do Amore Diamonds
27-9CA57A5A7 · Oct 31
$3,030 USD
View
17 more retailers have this diamond
Prices start from $341 USDSave up to $2,689 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
1.58ct Round
$341 USD