an observant Jew is some one who keeps all of the feast and festivals of Hashem (God) not deleting any
A secular or irreligious Jew.
It refers to a religiously observant Jew.
if they are observant, only kosher.
He's a non-observant Jew.
1. Quick to notice things.2. Following the rules of a religious community (and observant Jew, an observant Hindu, etc.)
He's a non-observant Jew.
Religiously observant Jews will only eat food that is kosher.
It can be. If it's for a religiously observant Jew it not only has to be kosher, it also has to be 'meshuval' meaning that it has been pasteurized.
A "non-observant Jew" is one who is not observant ... a Jew who doesn't organize his life to include such aspects as Sabbath and holiday observance, occasional prayer and learning, kosher diet, etc. The reason may be the fact that he was not introduced to that kind of life as he grew up, or wasn't educated or trained in Jewish life, or that he knows very well what's involved and willfully decides to ignore it.
A Sabbath-observant Jew probably doesn't spend a lot of time thinking about jewelery. It is permitted to wear jewelery on the Sabbath (if that is the question).
You cannot (just by looking). A rabbi generally dresses like any other observant Jew.
Steve Hill