I own jewelry worth $5,000. If I get married does this jewelry become shared property?

No. In Ontario, when you marry your jewelry remains your own.

If the jewelry increases in value during the marriage, upon separation your husband will be entitled to share in the increase in the value of the jewelry.

If you have a marriage contract (or a prenuptual agreement), it may outline that if your marriage comes to an end your jewelry is your property and any increase in the value of the jewelry during the marriage will not be shared with your spouse.