I am desperately looking for some help please.
I need to write about 20 different gemstones. I have to talk about their physical properties relating to the following: Colour, Opacity, Moh's scale of hardness, Directional Properties and Elements of risk.
The colour part, Moh's scale etc is fine but i don't really know what to write about the Directional properties and elements of risk. I have spent 3 weeks trying to find a site where it explains this in terms i can understamd (i'm new to this) and it just goes straight over my head.
Would someone please be able to give me an example for say a sapphire or Jadeite so i know where to look or if i'm on the right track with things.
I am so confused over all of this.
Many thanks Mhairi