The most common and most likely answer to this crossword clue is the 6 letter word GARNET
G
A
R
N
E
T
More clues leading to the result GARNET
- Stone trap fish approaches
- Grab article Royal Navy installed — hoisting gear
- Figure with cloth lifted up stone
- This stone is converted into inert gas
- Good profit by following a source of rare stone
- Mineral store almost completed on time
- 10 mop up stone...
- Gemstone found in a round floorcloth by 10 in retreat
- Fish catcher's abrasive
- Embracing a nurse, receive gem
Buddy explains!

The straight part
We know that "gem" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case gem = garnet.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does GARNET mean?
GARNET noun- A hard transparent mineral that is often used as gemstones and abrasives.
- A dark red color, like that of the gemstone.
- Of a dark red colour.
- A tackle for hoisting cargo in or out.
- To shred (twisted wool fiber, rags, etc.) so that it can be reused.