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12.85ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG581343784

Shape and cutting style on the report: Round brilliant

Certificate IGI LG581343784

Diamond specifications and retailer prices

From HK$12,189 HKD
£1,223 GBP
As of October 30, 2026
Save HK$53,056 HKD (81%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: HK$65,245 HKD at Adiamor · As of October 31, 2026
View at Adiamor

About this 12.85ct lab-grown round diamond

This 12.85ct lab-grown round sits in the over five carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG581343784 or 581343784. Listed at 11 retailers as of October 30, 2026, with prices from HK$12,189 to HK$65,245, a HK$53,056 spread on the same certified stone. Adiamor lists it at HK$65,245. 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

12.85
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG581343784
Dimensions15.16 × 15.26 × 9.19 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
15.16 mm15.26 mm12.85 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG581343784
Side View
Table 57.0%Crown 34°Girdle: MediumPavilion 40.8°Culet: NoneDepth 60.4%

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: Oct 30
Current: HK$65,245 HKD|Low: HK$12,189 HKD|High: HK$204,859 HKD|Avg: HK$52,478 HKD
Adiamor
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 31, 2026
Retailer 6HK$12,189 HKD
Retailer 8HK$13,047 HKD
Retailer 13HK$15,134 HKD
Retailer 9HK$16,476 HKD
Retailer 12HK$17,775 HKD
Retailer 11HK$19,865 HKD
Retailer 7HK$21,361 HKD
Retailer 10HK$24,088 HKD
Retailer 2HK$26,087 HKD
Retailer 3HK$28,362 HKD
AdiamorHK$65,245 HKD
Retailer 5HK$150,481 HKD
Retailer 4HK$204,859 HKD

4 data points across 13 retailers

11 retailersHK$12,189 HKD to HK$65,245 HKD

A
Cheapest Retailer
-
HK$12,189 HKD
£1,223 GBP
A
Retailer 2
-
HK$13,047 HKD
$1,663 USD
View
A
Retailer 3
-
HK$15,134 HKD
$1,929 USD
View
A
Retailer 4
-
HK$16,476 HKD
$2,100 USD
View
A
Retailer 5
-
HK$17,775 HKD
View
A
Retailer 6
-
HK$19,865 HKD
$2,532 USD
View
A
Retailer 7
-
HK$21,361 HKD
£2,144 GBP
View
A
Retailer 8
-
HK$24,088 HKD
€2,924 EUR
View
A
Retailer 9
-
HK$26,087 HKD
$3,325 USD
View
B+
Retailer 10
-
HK$28,362 HKD
$3,615 USD
View
Most Expensive
B
Adiamor
D-82828535 · Oct 31
HK$65,245 HKD
$8,316 USD
View
10 more retailers have this diamond
Prices start from HK$12,189 HKDSave up to HK$53,056 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
12.85ct Round
HK$12,189 HKD