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1.78ct D SI2 Round Lab Grown Diamond

ID • D/SI2 • IGI LG478122782

Shape and cutting style on the report: Round brilliant

Certificate IGI LG478122782

Diamond specifications and retailer prices

From HK$1,671 HKD
$213 USD
As of October 29, 2026
Save HK$7,536 HKD (82%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: HK$9,208 HKD at MOH London · As of October 29, 2026
View at MOH London

About this 1.78ct lab-grown round diamond

This 1.78ct lab-grown round sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG478122782 or 478122782. Listed at 7 retailers as of October 29, 2026, with prices from HK$1,671 to HK$9,208, a HK$7,536 spread on the same certified stone. MOH London lists it at HK$9,208. 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

1.78
Carat
D
Colour
SI2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.2°
Pavilion angle41.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG478122782
Dimensions7.74 × 7.71 × 4.83 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
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
7.74 mm7.71 mm1.78 ctD / SI2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG478122782
Side View
Table 58.0%Crown 35.2°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 62.5%

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: Oct 29
Current: HK$9,208 HKD|Low: HK$1,624 HKD|High: HK$9,477 HKD|Avg: HK$5,496 HKD|-2.8%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 29, 2026
Retailer 9HK$1,671 HKD
Retailer 8HK$1,938 HKD
Retailer 7HK$3,554 HKD
Retailer 2HK$3,583 HKD
Retailer 12HK$4,574 HKD
Retailer 3HK$4,920 HKD
Retailer 11HK$6,333 HKD
Retailer 5HK$6,677 HKD
Retailer 6HK$7,344 HKD
Retailer 10HK$7,344 HKD
Retailer 4HK$8,866 HKD
MOH LondonHK$9,208 HKD

39 data points across 12 retailers

7 retailersHK$1,671 HKD to HK$9,208 HKD

A
Cheapest Retailer
-
HK$1,671 HKD
$213 USD
A
Retailer 2
-
HK$1,938 HKD
$247 USD
View
B+
Retailer 3
-
HK$3,554 HKD
$453 USD
View
A
Retailer 4
-
HK$3,583 HKD
£360 GBP
View
B
Retailer 5
-
HK$6,677 HKD
$851 USD
View
B+
Retailer 6
-
HK$7,344 HKD
$936 USD
View
Most Expensive
B
MOH London
LG478122782 · Oct 29
HK$9,208 HKD
£924 GBP
View
6 more retailers have this diamond
Prices start from HK$1,671 HKDSave up to HK$7,536 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
1.78ct Round
HK$1,671 HKD