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0.55ct I SI1 Round Lab Grown Diamond

EX • I/SI1 • IGI LG451055359

Shape and cutting style on the report: Round brilliant

Certificate IGI LG451055359

Diamond specifications and retailer prices

From $522 NZD
$294 USD
As of November 1, 2026
Save $2,083 NZD (80%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $2,605 NZD at MOH London · As of October 29, 2026
View at MOH London

About this 0.55ct lab-grown round diamond

This 0.55ct lab-grown round sits in the half to three-quarter carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG451055359 or 451055359. Listed at 11 retailers as of October 29, 2026, with prices from $522 to $2,605, a $2,083 spread on the same certified stone. MOH London lists it at $2,605. 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

0.55
Carat
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle35.7°
Pavilion angle41.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG451055359
Dimensions5.18 × 5.21 × 3.28 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
5.18 mm5.21 mm0.55 ctI / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG451055359
Side View
Table 59.0%Crown 35.7°Girdle: MED-STKPavilion 41.4°Culet: NoneDepth 63.0%

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: $2,605 NZD|Low: $500 NZD|High: $2,621 NZD|Avg: $1,110 NZD|-0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 29, 2026
Retailer 7$522 NZD
Retailer 12$584 NZD
Retailer 3$605 NZD
Retailer 8$639 NZD
Retailer 9$646 NZD
Retailer 11$646 NZD
Retailer 4$923 NZD
Retailer 10$1,059 NZD
Retailer 2$1,198 NZD
Retailer 5$1,290 NZD
Retailer 6$1,985 NZD
Retailer 13$2,078 NZD
MOH London$2,605 NZD

20 data points across 13 retailers

11 retailers$522 NZD to $2,605 NZD

A
Cheapest Retailer
-
$522 NZD
$294 USD
A
Retailer 2
-
$584 NZD
$329 USD
View
Final sale: no returns
A
Retailer 3
-
$605 NZD
$341 USD
View
B+
Retailer 4
-
$639 NZD
$360 USD
View
Retailer 5
-
$646 NZD
$364 USD
View
Price last confirmed 7 days ago
B+
Retailer 6
-
$646 NZD
$364 USD
View
B+
Retailer 7
-
$1,059 NZD
$597 USD
View
B+
Retailer 8
-
$1,198 NZD
€643 EUR
View
B
Retailer 9
-
$1,985 NZD
$1,119 USD
View
B
Retailer 10
-
$2,078 NZD
$1,171 USD
View
Most Expensive
B
MOH London
LG451055359 · Oct 29
$2,605 NZD
£1,156 GBP
View
10 more retailers have this diamond
Prices start from $522 NZDSave up to $2,083 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
0.55ct Round
$522 NZD