---

All answers having "Stone" as clue:

3 Character Answers:

---

AGE

GEM

PIT



4 Character Answers:

---

AGES

FRED

LITH

ONYX

OPAL

PELT

ROCK

SARD

UNIT



5 Character Answers:

---

AGATE

JEWEL

LAPIS

LITHO

MASON

ONSET

SETIN

SLATE



7 Character Answers:

---

GRANITE

ROSETTA



8 Character Answers:

---

EYERHYME

LAPIDATE



14 Character Answers:

---

DIRECTOROLIVER

PREHISTORICAGE



15 Character Answers:

---

BACKGAMMONPIECE