A tutorial on the use of the Gem Refractometer, to help to identify a transparent gemstone. This video covers the basic use of this gemological instrument, and how it works.
Негізгі бет Gem Identification - Refractometer Basic Use
A tutorial on the use of the Gem Refractometer, to help to identify a transparent gemstone. This video covers the basic use of this gemological instrument, and how it works.
Пікірлер