Hard form of conundrum that loses its point (8)
I believe the answer is:
amethyst
This could be a double definition.
'hard' is the first definition.
Both the answer and definition are adjectives. Maybe there's a link between them I don't understand?
'form of conundrum that loses its point' is the second definition.
Although both the answer and definition are singular nouns, I don't see how one could define the other.
Can you help me to learn more?
(Other definitions for amethyst that I've seen before include "One showing sparkling facets" , "Purple quartz used in jewellery" , "A Middle East language" , "Something precious" , "what's in ring" .)