CaratHunter
Plans
Round|Lab Grown|IGI

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 $275 USD
As of November 6, 2026
Save $824 USD (75%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $1,099 USD 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 $275 to $1,099, a $824 spread on the same certified stone. MOH London lists it at $1,099. 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 angle34.2°
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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $1,099 USD|Low: $222 USD|High: $1,114 USD|Avg: $584 USD|-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$222 USD
Retailer 3$275 USD
Retailer 10$275 USD
Retailer 12$370 USD
Retailer 2$452 USD
Retailer 5$505 USD
Retailer 4$530 USD
Retailer 9$557 USD
Retailer 7$760 USD
Retailer 8$886 USD
Retailer 6$1,060 USD
MOH London$1,099 USD

43 data points across 12 retailers

19 retailers$275 USD to $1,099 USD

Retailer 1
-
$222 USD
Price last confirmed 27 days ago
Retailer 2
-
$257 USD
View
Price last confirmed 24 days ago
Retailer 3
-
$275 USD
View
Price last confirmed 12 days ago
Retailer 4
-
$275 USD
View
Price last confirmed 35 days ago
A
Retailer 5
-
$275 USD
View
B+
Retailer 6
-
$370 USD
View
A
Retailer 7
-
$452 USD
View
A
Retailer 8
-
$465 USD
View
A
Retailer 9
-
$505 USD
View
A
Retailer 10
-
$530 USD
View
B+
Retailer 11
-
$557 USD
View
B+
Retailer 12
-
$726 USD
View
B+
Retailer 13
-
$760 USD
View
Retailer 14
-
$883 USD
View
Price last confirmed 30 days ago
B
Retailer 15
-
$886 USD
View
B
Retailer 16
-
$889 USD
View
B
Retailer 17
-
$1,050 USD
View
B
Retailer 18
-
$1,060 USD
View
Most Expensive
B
MOH London
LG783641986 · Nov 5
$1,099 USD
£865 GBP
View
18 more retailers have this diamond
Prices start from $275 USDSave up to $824 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
$275 USD