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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 $363 NZD
As of November 1, 2026
Save $1,985 NZD (85%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $2,348 NZD 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 $363 to $2,348, a $1,985 spread on the same certified stone. Brilliant Earth lists it at $2,348. 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
Colour
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

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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: $2,348 NZD|Low: $228 NZD|High: $2,989 NZD|Avg: $1,110 NZD|-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 6, 2026
Retailer 7$228 NZD
Retailer 12$363 NZD
Retailer 13$406 NZD
Retailer 3$448 NZD
Retailer 2$758 NZD
Retailer 15$777 NZD
Retailer 11$815 NZD
Retailer 4$818 NZD
Retailer 14$907 NZD
Retailer 10$1,204 NZD
Retailer 8$1,316 NZD
Retailer 6$1,537 NZD
Retailer 9$2,097 NZD
Retailer 5$2,142 NZD
Brilliant Earth$2,348 NZD

36 data points across 15 retailers

14 retailers$363 NZD to $2,348 NZD

A
Cheapest Retailer
-
$363 NZD
A
Retailer 2
-
$406 NZD
View
Final sale: no returns
Retailer 3
-
$443 NZD
View
Price last confirmed 52 days ago
Retailer 4
-
$448 NZD
View
Price last confirmed 12 days ago
A
Retailer 5
-
$758 NZD
View
B+
Retailer 6
-
$777 NZD
View
B+
Retailer 7
-
$815 NZD
View
B+
Retailer 8
-
$818 NZD
View
B+
Retailer 9
-
$907 NZD
View
B+
Retailer 10
-
$1,204 NZD
View
B
Retailer 11
-
$1,316 NZD
View
B
Retailer 12
-
$1,537 NZD
View
B
Retailer 13
-
$2,097 NZD
View
Most Expensive
B
Brilliant Earth
20185628A · Nov 3
$2,348 NZD
$1,320 USD
View
13 more retailers have this diamond
Prices start from $363 NZDSave up to $1,985 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
$363 NZD