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Round|Lab Grown|IGI

1.78ct E SI2 Round Lab Grown Diamond

VG • E/SI2 • IGI LG786624855

Shape and cutting style on the report: Round brilliant

Certificate IGI LG786624855

Diamond specifications and retailer prices

From HK$1,773 HKD
$226 USD
As of October 29, 2026
Save HK$10,232 HKD (85%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: HK$12,005 HKD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

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 SI2 clarity (slightly-included), with a very-good cut grade and certified by IGI LG786624855 or 786624855. Listed at 13 retailers as of October 29, 2026, with prices from HK$1,773 to HK$12,005, a HK$10,232 spread on the same certified stone. Brilliant Earth lists it at HK$12,005. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.78
Carat
E
Colour
SI2
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG786624855
Dimensions7.74 × 7.62 × 4.78 mm
L/W Ratio1.02
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 mm7.62 mm1.78 ctE / SI2
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG786624855
Side View
Table 59.0%Crown 37°Girdle: MED-STKPavilion 40.5°Culet: NoneDepth 62.1%

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$12,005 HKD|Low: HK$1,695 HKD|High: HK$12,005 HKD|Avg: HK$4,968 HKD
Brilliant Earth
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$1,773 HKD
Retailer 11HK$1,985 HKD
Retailer 3HK$2,197 HKD
Retailer 6HK$3,633 HKD
Retailer 12HK$3,727 HKD
Retailer 2HK$4,071 HKD
Retailer 10HK$4,261 HKD
Retailer 4HK$5,351 HKD
Retailer 8HK$5,955 HKD
Retailer 7HK$6,356 HKD
Retailer 5HK$8,839 HKD
Brilliant EarthHK$12,005 HKD

29 data points across 12 retailers

13 retailersHK$1,773 HKD to HK$12,005 HKD

A
Cheapest Retailer
-
HK$1,773 HKD
$226 USD
A
Retailer 2
-
HK$1,985 HKD
$253 USD
View
Final sale: no returns
A
Retailer 3
-
HK$2,197 HKD
$280 USD
View
A
Retailer 4
-
HK$3,633 HKD
€441 EUR
View
B+
Retailer 5
-
HK$3,727 HKD
$475 USD
View
B+
Retailer 6
-
HK$4,071 HKD
£409 GBP
View
B+
Retailer 7
-
HK$4,261 HKD
$543 USD
View
B+
Retailer 8
-
HK$5,351 HKD
$682 USD
View
B
Retailer 9
-
HK$5,955 HKD
$759 USD
View
B
Retailer 10
-
HK$6,356 HKD
$810 USD
View
Retailer 11
-
HK$6,552 HKD
$835 USD
View
Price last confirmed 44 days ago
B
Retailer 12
-
HK$8,839 HKD
£887 GBP
View
Most Expensive
B
Brilliant Earth
19892742A · Oct 29
HK$12,005 HKD
$1,530 USD
View
12 more retailers have this diamond
Prices start from HK$1,773 HKDSave up to HK$10,232 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$1,773 HKD