jewel 多指贵重的宝石，是经过切削打磨，通常镶嵌在胸针、项链或其它装饰物上的玉。
jewel lery是珠宝的总称，泛指各类珠宝，既指佩带或衣服的珠宝饰物，又指用普通金属、塑料或假宝石制作的装饰物。
stone 特别强调稀少罕见或值钱的矿物。
gem 指经切割、磨光的宝石，引申指珍品、佳作。
参考例句
1. He was stoned to death. 他是被人用石块砸死的。
2. A stone hit him on the temple. 一块石头击中了他的太阳穴。
3. The boy hit the glass with stone. 那个男孩用石头击中了玻璃。
英英解释
n.
1. a lump or mass of hard consolidated mineral matter
2. material consisting of the aggregate of minerals like those making up the Earth's crust
3. building material consisting of a piece of rock hewn in a definite shape for a special purpose
4. a crystalline rock that can be cut and polished for jewelry
5. the hard inner (usually woody) layer of the pericarp of some fruits (as peaches or plums or cherries
6. an avoirdupois unit used to measure the weight of a human body; equal to 14 pounds
7. United States jurist who was named chief justice of the United States Supreme Court in 1941 by Frank
8. United States filmmaker (born in 1946)
9. United States feminist and suffragist (1818-1893)
10. United States journalist who advocated liberal causes (1907-1989)
11. United States jurist who served on the United States Supreme Court as chief justice (1872-1946)
12. United States architect (1902-1978)
13. a lack of feeling or expression or movement v.
1. kill by throwing stones at
2. remove the pits from adj.
1. of any of various dull tannish or grey colors
