Most sets steer clear of being clearly for boys or clearly for girls.
You steer clear of sugar, refined carbs, chips, mashed potatoes, alcohol and so on.
Be sure you steer clear of giving your child grapes, hard candy, popcorn, hotdogs, nuts, etc., and watch out for small objects that he can access.
If she is particularly conservative, you'll want to steer clear of anything risqué or which can be construed as inappropriate.
The reason it's so important to find a trusted jewelry dealer is because he will be able to help you steer clear of imitation gemstones.