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1.91ct K SI1 Round Lab Grown Diamond

EX • K/SI1 • IGI LG451056918

Shape and cutting style on the report: Round brilliant

Certificate IGI LG451056918

Diamond specifications and retailer prices

From HK$9,273 HKD
As of November 5, 2026
Save HK$25,270 HKD (73%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: HK$34,543 HKD at MOH London · As of November 1, 2026
View at MOH London

About this 1.91ct lab-grown round diamond

This 1.91ct 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 LG451056918 or 451056918. Listed at 10 retailers as of November 1, 2026, with prices from HK$9,273 to HK$34,543, a HK$25,270 spread on the same certified stone. MOH London lists it at HK$34,543. 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

1.91
Carat
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.3°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG451056918
Dimensions8.08 × 8.12 × 4.72 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
8.08 mm8.12 mm1.91 ctK / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG451056918
Side View
Table 62.0%Crown 33.3°Girdle: MED-STKPavilion 40.2°Culet: NoneDepth 58.2%

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: HK$34,543 HKD|Low: HK$8,896 HKD|High: HK$35,011 HKD|Avg: HK$16,649 HKD
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 4HK$9,273 HKD
Retailer 5HK$10,756 HKD
Retailer 7HK$10,756 HKD
Retailer 2HK$11,768 HKD
Retailer 3HK$12,121 HKD
Retailer 9HK$15,377 HKD
Retailer 6HK$17,063 HKD
Retailer 8HK$21,190 HKD
MOH LondonHK$34,543 HKD

37 data points across 9 retailers

10 retailersHK$9,273 HKD to HK$34,543 HKD

A
Cheapest Retailer
-
HK$9,273 HKD
A
Retailer 2
-
HK$10,081 HKD
View
B+
Retailer 3
-
HK$10,756 HKD
View
Retailer 4
-
HK$10,756 HKD
View
Price last confirmed 25 days ago
A
Retailer 5
-
HK$11,768 HKD
View
B+
Retailer 6
-
HK$12,121 HKD
View
B
Retailer 7
-
HK$17,063 HKD
View
B
Retailer 8
-
HK$20,154 HKD
View
B
Retailer 9
-
HK$21,190 HKD
View
Most Expensive
B
MOH London
LG451056918 · Nov 1
HK$34,543 HKD
£3,467 GBP
View
9 more retailers have this diamond
Prices start from HK$9,273 HKDSave up to HK$25,270 HKD

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
1.91ct Round
HK$9,273 HKD