The most common and most likely answer to this crossword clue is the 6 letter word STONES
I've seen this crossword clue in Independent
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More clues leading to the result STONES
- Gems of quality brought aboard ship
- Rock group members‘ initially short tempers
- Rocks steamship filled with air
- In earnest, one snatched weights
- Seconds includes Eton mess with seeds
- Ship carrying quality jewels
- Gems for 28 pounds or more
- British group informally making lots of pounds
- Attacks a pop group
- Gems thrown out by last one standing
Buddy explains!

The straight part
We know that "Gems/28 pounds or more" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case gems/28 pounds or more = stones.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 STONES mean?
STONES noun- A hard earthen substance that can form large rocks.
- A small piece of stone, a pebble.
- A gemstone, a jewel, especially a diamond.
- (plural: stone) A unit of mass equal to 14 pounds. Used to measure the weights of people, animals, cheese, wool, etc. 1 stone ≈ 6.3503 kilograms
- The central part of some fruits, particularly drupes; consisting of the seed and a hard endocarp layer.
- A hard, stone-like deposit.
- A playing piece made of any hard material, used in various board games such as backgammon, and go.
- A dull light grey or beige, like that of some stones.
- A 42-pound, precisely shaped piece of granite with a handle attached, which is bowled down the ice.
- A monument to the dead; a gravestone or tombstone.
- A mirror, or its glass.
- A testicle of an animal.
- A stand or table with a smooth, flat top of stone, commonly marble, on which to arrange the pages of a book, newspaper, etc. before printing; also called imposing stone.
- To pelt with stones, especially to kill by pelting with stones.
- To wall with stones.
- To remove a stone from (fruit etc.).
- To form a stone during growth, with reference to fruit etc.
- To intoxicate, especially with narcotics. (Usually in passive)
- To do nothing, to stare blankly into space and not pay attention when relaxing or when bored.
- To lap with an abrasive stone to remove surface irregularities.
- Testicles; balls.
- Courage.