Hello Wendy A jewel is a precious stone like a diamond, jewelry/jewellery, as Michael says, is things produced from jewels which you can wear, for example - rings and necklaces. Best wishes Bob

First the grammar: "Jewel" is a countable noun, which means that it has a plural form (jewels), and it needs an article in the singular form ( e.g. "That's a nice jewel"). "Jewelry" or 'jewellery" is an uncountable noun, which means that it has no plural form, and it doesn't need an article ( e.g. "That's nice jewellery"). If you want to make this word specifically singular or plural, you need to join it to a countable noun with the word "of" : for example, "an item/piece of jewellery" /"several items/pieces of jewellery". Now the meaning: Bob was right to narrow down Michael's definition of "jewel" - a jewel is a precious gemstone ( a diamond or an emerald, for example.) . 'A jewel' can't normally refer just to gold or another metal, however valuable. I'd also like to add to Bob's definition of "jewellery" . Jewellery can be made from jewels ( a ruby ring or a diamond necklace, for example), but it doesn't have to be - a plain ring, necklace, bracelet or pair of earrings (made just from metal, for example), also counts as jewellery. Jewellery can also be made from non-precious materials - glass or plastic, for example. One final extra definition. In the plural form only , "jewels" can refer collectively to jewellery and other precious wearables. This is a fairly outdated usage, as in "the Crown Jewels".

Jewel means precious as in stones, gold etc Whereas jewelry is the result of craft and workmanship in producing rings, necklaces etc

jewelry 是珠宝首饰的总称，是不可数名词的一种：不可数的集合名词（另有可数的集合名词，如 group, troup, people, gang, committee）。 这种名词因为是总称，所有个体都包括了，当然是不可数的了，一般没有复数形式。 其中有的有对应的个体名词（可数），如： jewelry: jewel machinery: machine poetry: poem 有的没有对应的个体名词，说到其中的个体的时候，需要用量词（quantifier）来表示： a piece of furniture/ information/equipment 通用的量词有 piece, item, article等几个。 其他的量词不是固定的，只要能够表示计量、计数的名词都可以充当量词，例如： a swarm of locusts 一群蝗虫 和汉语一样，英语的名词往往与相对固定的量词配合使用；但是英语名-量的配合关系比汉语的配合关系要灵活得多。只要一定的名词可以用来计量或计数都可以用——条件是你的用法不让受者感到别扭。许多量词的使用具有描写或比喻的修辞作用，可以使语言生色而又保持简洁。 也可以说： a big cloud of locusts 一大群遮天蔽日的蝗虫 这里面就有与swarm不同的形象的描述了，cloud表现了蝗虫数量的多、密和—— 可怕！一个量词就表现了这么多的意思，所以选用巧妙、适当的量词可以收到言简义丰的表达效果。 汉语的量词的使用有时也有一定的灵活性，有的也有一定描写、比喻作用，例如：一弯明月，就可以表现出：不是满月（时间不是月中），月亮的形状，天气叫晴朗（云量少）等意义，具有一定的描述作用。但是汉语量词的使用大多数情况下只有计量或计数的作用。 a big cloud of locusts 一大群铺天盖日的蝗虫 当然，也不是所有的个体名词都有对应的总称/全称/泛称名词。要表示这种总称的意思，也需要用量词+名词（单数或复数）的形式。