Things You'll Need
Instructions
Identify the marble's type by recognizing its patterns and colors.
Use a caliper to measure the size of the marble(s) in question. Circle templates can also help you identify the difference between machine or handmade marbles.
Name the manufacturer by learning the difference between marble manufacturers and their marble-making methods. Carry and study a marble identification book written by an expert in marble collectibles.
Date the marble's origination using the information gathered in Steps 1 to 3. Collect marbles made during the 1950's and earlier to gain a more valuable collection.