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Round|Lab Grown|IGI

1.78ct E SI1 Round Lab Grown Diamond

ID • E/SI1

Diamond specifications and retailer prices

From HK$1,742 HKD
$222 USD
As of October 29, 2026
Save HK$5,186 HKD (75%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: HK$6,928 HKD at NZ Jewellers · As of October 27, 2026
View at NZ Jewellers

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 E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI. Listed at 5 retailers as of October 27, 2026, with prices from HK$1,742 to HK$6,928, a HK$5,186 spread on the same certified stone. NZ Jewellers lists it at HK$6,928. 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
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabIGI
Dimensions7.78 × 7.82 × 0.00 mm
L/W Ratio1.01
Top View
7.78 mm7.82 mm1.78 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI
Side View
Table 58.0%CrownGirdle: MediumPavilionCulet: NoneDepth 61.1%

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: Oct 29
Current: HK$6,928 HKD|Low: HK$1,711 HKD|High: HK$7,093 HKD|Avg: HK$3,623 HKD|-2.3%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
October 29, 2026
Retailer 4HK$1,742 HKD
Retailer 5HK$2,017 HKD
Retailer 3HK$2,158 HKD
Retailer 6HK$2,205 HKD
Retailer 2HK$3,740 HKD
Retailer 7HK$5,861 HKD
NZ JewellersHK$6,928 HKD

30 data points across 7 retailers

5 retailersHK$1,742 HKD to HK$6,928 HKD

A
Cheapest Retailer
-
HK$1,742 HKD
$222 USD
A
Retailer 2
-
HK$2,017 HKD
$257 USD
View
A
Retailer 3
-
HK$2,158 HKD
$275 USD
View
A
Retailer 4
-
HK$3,740 HKD
£375 GBP
View
Most Expensive
B
NZ Jewellers
cbee3b9f-6ee5-45a5-af39-b2f03e4aede7 · Oct 27
HK$6,928 HKD
$883 USD
View
4 more retailers have this diamond
Prices start from HK$1,742 HKDSave up to HK$5,186 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$1,742 HKD