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Round|Lab Grown|IGI

1.55ct D SI1 Round Lab Grown Diamond

ID • D/SI1 • IGI LG772678680

Shape and cutting style on the report: Round brilliant

Certificate IGI LG772678680

Diamond specifications and retailer prices

From $197 USD
As of November 1, 2026
Save $1,693 USD (90%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $1,890 USD at Do Amore Diamonds · As of November 2, 2026
View at Do Amore Diamonds

About this 1.55ct lab-grown round diamond

This 1.55ct lab-grown round sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG772678680 or 772678680. Listed at 15 retailers as of November 1, 2026, with prices from $197 to $1,890, a $1,693 spread on the same certified stone. Do Amore Diamonds lists it at $1,890. 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

1.55
Carat
D
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG772678680
Dimensions7.42 × 7.46 × 0.00 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.42 mm7.46 mm1.55 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG772678680
Side View
Table 58.0%Crown 34.5°Girdle: MED-STKPavilion 40.5°Culet: NoneDepth 60.9%

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: Nov 1
Current: $1,890 USD|Low: $189 USD|High: $1,890 USD|Avg: $725 USD
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
November 2, 2026
Retailer 12$197 USD
Retailer 3$229 USD
Retailer 14$330 USD
Retailer 7$365 USD
Retailer 9$436 USD
Retailer 5$466 USD
Retailer 10$564 USD
Retailer 8$710 USD
Retailer 11$745 USD
Retailer 15$803 USD
Retailer 4$867 USD
Retailer 2$1,080 USD
Retailer 6$1,081 USD
Retailer 13$1,140 USD
Do Amore Diamonds$1,890 USD

25 data points across 15 retailers

15 retailers$197 USD to $1,890 USD

A
Cheapest Retailer
-
$197 USD
A
Retailer 2
-
$229 USD
View
B+
Retailer 3
-
$330 USD
View
A
Retailer 4
-
$365 USD
View
A
Retailer 5
-
$436 USD
View
A
Retailer 6
-
$466 USD
View
B+
Retailer 7
-
$564 USD
View
B+
Retailer 8
-
$710 USD
View
B+
Retailer 9
-
$745 USD
View
B+
Retailer 10
-
$803 USD
View
B
Retailer 11
-
$867 USD
View
B
Retailer 12
-
$1,080 USD
View
B
Retailer 13
-
$1,081 USD
View
B
Retailer 14
-
$1,140 USD
View
Most Expensive
B
Do Amore Diamonds
27-F2486157E · Nov 2
$1,890 USD
View
14 more retailers have this diamond
Prices start from $197 USDSave up to $1,693 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
1.55ct Round
$197 USD