When I

>! separate out the individual jewel colours

I get

>! [![this image][1]][1] 

which looks like

>! A red/ruby B, an orange/amber G, and a yellow 's

However I can't quite work out how to apply 

>! the hint to incorporate the pattern made by each colour of jewel with that colour itself - B + red = bread? BG's = Bee Gees?

Based on comments from the OP:

>! The orange jewels are not intended to be a G - perhaps a C then? And the names of the colours are stated as given. So we have:
>! Bred Corange 'syellow...   
>! The OP indicates that we have to make unique dictionary words, so:  
>! B+RED = BRED  
>! C+ORANGE = ACROGEN (a kind of moss or fern apparently)  
>! 'S+YELLOW = ??? OWL'S LEY? WOLLEY'S? YELLOW'S?  
>! and then put these together in an order that will point to a key.... I am completely stumped at this point.


  [1]: https://i.sstatic.net/Nh8Jc.png