The most common and most likely answer to this crossword clue is the 7 letter word OPALINE
I've seen this crossword clue in The Guardian
O
P
A
L
I
N
E
More clues leading to the result OPALINE
- Express view about gangster being shot?
- Work on a course of gems
- Whitish individual tours China and India
- Work on a product with shimmery colouring
- Hold forth about gang leader, getting shot
- Old pasty keeps in whitish glass
- Glass is to give view around a lake
- Stone-like work by a band
- Python in poem dropping dead like a stone
- After work, have beer brought round in glass
Buddy explains!

The straight part
We know that "Stone-like" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case stone-like = opaline.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 OPALINE mean?
OPALINE noun- A clear to white liquid secreted by sea hares (genus Aplysia) that becomes viscous upon contact with water
- Any of several minerals resembling opal, including a variety of yellow chalcedony
- Opal glass
- Resembling opal in its iridescence; having a milky white iridescence.