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Round|Lab Grown|IGI

1.80ct K SI1 Round Lab Grown Diamond

ID • K/SI1 • IGI LG451056263

Shape and cutting style on the report: Round brilliant

Certificate IGI LG451056263

Diamond specifications and retailer prices

From $1,593 AUD
As of November 5, 2026
Save $4,329 AUD (73%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $5,922 AUD at MOH London · As of November 5, 2026
View at MOH London

About this 1.8ct lab-grown round diamond

This 1.8ct 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 LG451056263 or 451056263. Listed at 9 retailers as of November 5, 2026, with prices from $1,593 to $5,922, a $4,329 spread on the same certified stone. MOH London lists it at $5,922. 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

1.80
Carat
K
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.9°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG451056263
Dimensions7.74 × 7.79 × 4.84 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
7.74 mm7.79 mm1.80 ctK / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG451056263
Side View
Table 55.0%Crown 35.9°Girdle: MED-STKPavilion 40.3°Culet: NoneDepth 62.3%

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: $5,922 AUD|Low: $1,593 AUD|High: $6,016 AUD|Avg: $3,257 AUD|-1.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 5, 2026
Retailer 3$1,593 AUD
Retailer 4$1,847 AUD
Retailer 2$2,093 AUD
Retailer 7$2,660 AUD
Retailer 5$2,938 AUD
Retailer 6$3,748 AUD
MOH London$5,922 AUD

15 data points across 7 retailers

9 retailers$1,593 AUD to $5,922 AUD

A
Cheapest Retailer
-
$1,593 AUD
A
Retailer 2
-
$1,733 AUD
View
A
Retailer 3
-
$1,847 AUD
View
Retailer 4
-
$1,847 AUD
View
Price last confirmed 25 days ago
B+
Retailer 5
-
$2,093 AUD
View
B+
Retailer 6
-
$2,938 AUD
View
B
Retailer 7
-
$3,464 AUD
View
B
Retailer 8
-
$3,748 AUD
View
Most Expensive
B
MOH London
LG451056263 · Nov 5
$5,922 AUD
£3,264 GBP
View
8 more retailers have this diamond
Prices start from $1,593 AUDSave up to $4,329 AUD

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
1.80ct Round
$1,593 AUD