Is there any relation between the word "cosmos" and κόσμημα?
Yes! You are wonderful to have noticed that! Κόσμος=world,universe,all the people in Greek is related to the verb "κοσμώ"="to decorate". That is because our world is a jewel, according to Greeks...
Sweet! It was totally appropriate to relate the brightness of jewels and stars.
It counted "piece of jewelry" wrong and suggested "piece of jewellry." Even though, jewelry is spelled with only one L.
That's weird, since "piece of jewelry/piece of jewellery" had not been included in the alternatives at all. Anyway, they have been added now, thanks!
Audio: Fast version: κόσμημα sounds like 'kormima', but the slow version of the word alone sounds correct (kosmima). Strange!
I agree. I have encountered the same thing in other words also.
It sounds good to me
How does one distinguish between jewels (e.g. a number of raw gemstones) and jewelery, since the word for both appears to be κοσμήματα, the plural of κόσμημα?
Well, depending on its use, a gemstone can either be "κόσμημα" or "πολύτιμος λίθος" (=precious stone).