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Oval|Lab Grown|IGI

1.78ct F SI1 Oval Lab Grown Diamond

ID • F/SI1 • IGI LG779671606

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG779671606

Diamond specifications and retailer prices

From HK$1,844 HKD
$235 USD
As of November 1, 2026
Save HK$8,277 HKD (82%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: HK$10,121 HKD at Brilliant Earth · As of November 1, 2026
View at Brilliant Earth

About this 1.78ct lab-grown oval diamond

This 1.78ct lab-grown oval sits in the one-and-a-half to two carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG779671606 or 779671606. Listed at 16 retailers as of November 1, 2026, with prices from HK$1,844 to HK$10,121, a HK$8,277 spread on the same certified stone. Brilliant Earth lists it at HK$10,121. 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
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.1°
Pavilion angle41.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG779671606
Dimensions9.51 × 6.71 × 4.36 mm
L/W Ratio1.42
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.51 mm6.71 mm1.78 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG779671606
Side View
Table 62.0%Crown 37.1°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 65.0%

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: Nov 1
Current: HK$10,121 HKD|Low: HK$1,773 HKD|High: HK$10,435 HKD|Avg: HK$4,979 HKD|-3.0%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
November 1, 2026
Retailer 11HK$1,844 HKD
Retailer 3HK$2,063 HKD
Retailer 4HK$2,142 HKD
Retailer 6HK$2,283 HKD
Retailer 12HK$2,283 HKD
Retailer 10HK$2,962 HKD
Retailer 13HK$3,868 HKD
Retailer 7HK$4,318 HKD
Retailer 5HK$4,935 HKD
Retailer 14HK$7,344 HKD
Retailer 9HK$7,375 HKD
Retailer 8HK$8,434 HKD
Retailer 2HK$9,157 HKD
Brilliant EarthHK$10,121 HKD

43 data points across 14 retailers

16 retailersHK$1,844 HKD to HK$10,121 HKD

A
Cheapest Retailer
-
HK$1,844 HKD
$235 USD
A
Retailer 2
-
HK$2,063 HKD
$263 USD
View
Final sale: no returns
A
Retailer 3
-
HK$2,142 HKD
$273 USD
View
Retailer 4
-
HK$2,283 HKD
$291 USD
View
Price last confirmed 7 days ago
A
Retailer 5
-
HK$2,283 HKD
$291 USD
View
Retailer 6
-
HK$2,962 HKD
£297 GBP
View
Price last confirmed 18 days ago
B+
Retailer 7
-
HK$3,868 HKD
$493 USD
View
A
Retailer 8
-
HK$4,318 HKD
£433 GBP
View
A
Retailer 9
-
HK$4,880 HKD
$622 USD
View
A
Retailer 10
-
HK$4,935 HKD
$629 USD
View
B+
Retailer 11
-
HK$7,344 HKD
$936 USD
View
B+
Retailer 12
-
HK$7,375 HKD
$940 USD
View
B+
Retailer 13
-
HK$7,757 HKD
$989 USD
View
B+
Retailer 14
-
HK$8,434 HKD
$1,075 USD
View
B+
Retailer 15
-
HK$9,157 HKD
£919 GBP
View
Most Expensive
B
Brilliant Earth
17997459A · Nov 1
HK$10,121 HKD
$1,290 USD
View
15 more retailers have this diamond
Prices start from HK$1,844 HKDSave up to HK$8,277 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 Oval
HK$1,844 HKD