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1.55ct D SI1 Round Lab Grown Diamond

ID • D/SI1 • IGI LG783641986

Shape and cutting style on the report: Round brilliant

Certificate IGI LG783641986

Diamond specifications and retailer prices

From $489 NZD
As of November 6, 2026
Save $1,465 NZD (75%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $1,954 NZD at MOH London · As of November 5, 2026
View at MOH London

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 LG783641986 or 783641986. Listed at 19 retailers as of November 5, 2026, with prices from $489 to $1,954, a $1,465 spread on the same certified stone. MOH London lists it at $1,954. 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
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.2°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG783641986
Dimensions7.42 × 7.38 × 4.59 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
7.42 mm7.38 mm1.55 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG783641986
Side View
Table 57.0%Crown 34.2°Girdle: MED-STKPavilion 41°Culet: NoneDepth 62.1%

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 6
Current: $1,954 NZD|Low: $395 NZD|High: $1,981 NZD|Avg: $1,039 NZD|-0.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 6, 2026
Retailer 11$395 NZD
Retailer 3$489 NZD
Retailer 10$489 NZD
Retailer 12$658 NZD
Retailer 2$804 NZD
Retailer 5$898 NZD
Retailer 4$943 NZD
Retailer 9$991 NZD
Retailer 7$1,352 NZD
Retailer 8$1,576 NZD
Retailer 6$1,886 NZD
MOH London$1,954 NZD

43 data points across 12 retailers

19 retailers$489 NZD to $1,954 NZD

Retailer 1
-
$395 NZD
Price last confirmed 27 days ago
Retailer 2
-
$457 NZD
View
Price last confirmed 24 days ago
Retailer 3
-
$489 NZD
View
Price last confirmed 12 days ago
Retailer 4
-
$489 NZD
View
Price last confirmed 35 days ago
A
Retailer 5
-
$489 NZD
View
B+
Retailer 6
-
$658 NZD
View
A
Retailer 7
-
$804 NZD
View
A
Retailer 8
-
$827 NZD
View
A
Retailer 9
-
$898 NZD
View
A
Retailer 10
-
$943 NZD
View
B+
Retailer 11
-
$991 NZD
View
B+
Retailer 12
-
$1,291 NZD
View
B+
Retailer 13
-
$1,352 NZD
View
Retailer 14
-
$1,571 NZD
View
Price last confirmed 30 days ago
B
Retailer 15
-
$1,576 NZD
View
B
Retailer 16
-
$1,581 NZD
View
B
Retailer 17
-
$1,868 NZD
View
B
Retailer 18
-
$1,886 NZD
View
Most Expensive
B
MOH London
LG783641986 · Nov 5
$1,954 NZD
£865 GBP
View
18 more retailers have this diamond
Prices start from $489 NZDSave up to $1,465 NZD

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
$489 NZD