Round|Lab Grown|IGI

1.55ct D SI1 Round Lab Grown Diamond

VG • D/SI1 • IGI LG784643985

Shape and cutting style on the report: Round brilliant

Certificate IGI LG784643985

Diamond specifications and retailer prices

From $204 USD
As of November 1, 2026
Save $1,116 USD (85%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $1,320 USD at Brilliant Earth · As of November 3, 2026
View at Brilliant Earth

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 very-good cut grade and certified by IGI LG784643985 or 784643985. Listed at 14 retailers as of November 1, 2026, with prices from $204 to $1,320, a $1,116 spread on the same certified stone. Brilliant Earth lists it at $1,320. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.55
Carat
D
Color
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle37°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG784643985
Dimensions7.41 × 7.32 × 4.55 mm
L/W Ratio1.01
Girdle conditionFaceted
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
7.41 mm7.32 mm1.55 ctD / SI1
OriginLab Grown
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG784643985
Side View
Table 59.0%Crown 37°Girdle: MED-THKPavilion 40.4°Culet: NoneDepth 61.6%

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 1
Current: $1,320 USD|Low: $128 USD|High: $1,680 USD|Avg: $624 USD|-21.4%
Brilliant Earth
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 4, 2026
Retailer 7$128 USD
Retailer 12$204 USD
Retailer 13$228 USD
Retailer 3$252 USD
Retailer 8$420 USD
Retailer 15$437 USD
Retailer 11$458 USD
Retailer 4$460 USD
Retailer 14$510 USD
Retailer 10$677 USD
Retailer 2$740 USD
Retailer 6$864 USD
Retailer 9$1,179 USD
Retailer 5$1,204 USD
Brilliant Earth$1,320 USD

35 data points across 15 retailers

14 retailers$204 USD to $1,320 USD

A
Cheapest Retailer
-
$204 USD
A
Retailer 2
-
$228 USD
View
Final sale: no returns
Retailer 3
-
$249 USD
View
Price last confirmed 52 days ago
Retailer 4
-
$252 USD
View
Price last confirmed 12 days ago
A
Retailer 5
-
$420 USD
View
B+
Retailer 6
-
$437 USD
View
B+
Retailer 7
-
$458 USD
View
B+
Retailer 8
-
$460 USD
View
B+
Retailer 9
-
$510 USD
View
B+
Retailer 10
-
$677 USD
View
B
Retailer 11
-
$740 USD
View
B
Retailer 12
-
$864 USD
View
B
Retailer 13
-
$1,179 USD
View
Most Expensive
B
Brilliant Earth
20185628A · Nov 3
$1,320 USD
View
13 more retailers have this diamond
Prices start from $204 USDSave up to $1,116 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
$204 USD