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1.55ct K SI1 Round Lab Grown Diamond

EX • K/SI1 • IGI LG436073481

Shape and cutting style on the report: Round brilliant

Certificate IGI LG436073481

Diamond specifications and retailer prices

From $1,715 NZD
As of November 5, 2026
Save $5,015 NZD (75%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $6,730 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 K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG436073481 or 436073481. Listed at 10 retailers as of November 5, 2026, with prices from $1,715 to $6,730, a $5,015 spread on the same certified stone. MOH London lists it at $6,730. 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
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32°
Pavilion angle41.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG436073481
Dimensions7.48 × 7.51 × 4.54 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
7.48 mm7.51 mm1.55 ctK / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG436073481
Side View
Table 60.5%Crown 32°Girdle: UNDPavilion 41.6°Culet: NoneDepth 60.6%

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 5
Current: $6,730 NZD|Low: $1,647 NZD|High: $6,839 NZD|Avg: $3,389 NZD|-0.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 5$1,715 NZD
Retailer 6$1,989 NZD
Retailer 8$1,989 NZD
Retailer 2$2,177 NZD
Retailer 3$2,304 NZD
Retailer 9$2,917 NZD
Retailer 7$3,181 NZD
Retailer 4$4,287 NZD
Retailer 10$5,694 NZD
MOH London$6,730 NZD

40 data points across 10 retailers

10 retailers$1,715 NZD to $6,730 NZD

A
Cheapest Retailer
-
$1,715 NZD
A
Retailer 2
-
$1,866 NZD
View
B+
Retailer 3
-
$1,989 NZD
View
Retailer 4
-
$1,989 NZD
View
Price last confirmed 25 days ago
B+
Retailer 5
-
$2,177 NZD
View
B+
Retailer 6
-
$2,304 NZD
View
B
Retailer 7
-
$3,181 NZD
View
B
Retailer 8
-
$4,287 NZD
View
B
Retailer 9
-
$5,593 NZD
View
Most Expensive
B
MOH London
LG436073481 · Nov 5
$6,730 NZD
£2,979 GBP
View
9 more retailers have this diamond
Prices start from $1,715 NZDSave up to $5,015 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
$1,715 NZD