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Round|Lab Grown|IGI

1.58ct G SI1 Round Lab Grown Diamond

EX • G/SI1 • IGI LG12255716

Shape and cutting style on the report: Round brilliant

Certificate IGI LG12255716

Diamond specifications and retailer prices

From $528 SGD
$413 USD
As of November 1, 2026
Save $1,833 SGD (78%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $3,925 SGD at Do Amore Diamonds · As of November 2, 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 G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG12255716 or 12255716. Listed at 14 retailers as of November 1, 2026, with a 347% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
G
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG12255716
Dimensions7.57 × 7.53 × 4.53 mm
L/W Ratio1.01
Culet sizePointed
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
7.57 mm7.53 mm1.58 ctG / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG12255716
Side View
Table 60.5%Crown 34°Girdle: MED-UNDPavilion 40.9°Culet: NoneDepth 60.0%

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: Nov 1
Current: $3,925 SGD|Low: $369 SGD|High: $3,925 SGD|Avg: $1,400 SGD|+37.1%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 9$369 SGD
Retailer 5$528 SGD
Retailer 6$880 SGD
Retailer 8$1,081 SGD
Retailer 2$1,090 SGD
Retailer 4$1,604 SGD
Retailer 10$1,696 SGD
Retailer 7$2,140 SGD
Retailer 3$2,361 SGD
Do Amore Diamonds$3,925 SGD

30 data points across 10 retailers

14 retailers$528 SGD to $2,361 SGD

Retailer 1
-
$298 SGD
$233 USD
Price last confirmed 40 days ago
Retailer 2
-
$345 SGD
$270 USD
View
Price last confirmed 40 days ago
Retailer 3
-
$364 SGD
$285 USD
View
Price last confirmed 41 days ago
A
Retailer 4
-
$528 SGD
$413 USD
View
B+
Retailer 5
-
$741 SGD
$580 USD
View
B
Retailer 6
-
$880 SGD
$688 USD
View
B
Retailer 7
-
$1,081 SGD
$846 USD
View
B
Retailer 8
-
$1,090 SGD
£671 GBP
View
Retailer 9
-
$1,309 SGD
$1,024 USD
View
Price last confirmed 42 days ago
B
Retailer 10
-
$1,604 SGD
$1,255 USD
View
B
Retailer 11
-
$1,696 SGD
$1,327 USD
View
B
Retailer 12
-
$2,140 SGD
$1,674 USD
View
C
Retailer 13
-
$2,361 SGD
£1,454 GBP
View
Most Expensive
Do Amore Diamonds
27-42F31B056 · Nov 2
$3,925 SGD
$3,070 USD
View
Price under review
13 more retailers have this diamond
Prices start from $528 SGDSave up to $1,833 SGD

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
$528 SGD