Wash and crush 3 cups raspberries. If you use a food processor, set pulse to chop, not puree.
Stir Lemon Juice into fruit. Stir sugar into fruit mix. Do not reduce the sugar or use a sugar substitute (this could cause result failures). Let stand for 10 minutes, stirring occasionally.
After the 10 min., mix 3/4 cup water and Sure Jell in a sauce pan. Bring to a boil and boil for 1 minute, stirring constantly.
Immediately stir Sure Jell mixture into prepared fruit mixture. Stir constantly for 3 minutes. (Stir until sugar is completely dissolved.)
Fill jars quickly, leaving 1/2 inch of space at top. Cover with lids.
Let stand at room temperature for 24 hrs.
Freeze for up to 1 year and thaw in refrigerator before using. It is not necessary to freeze first. You can immediately put a jar into the fridge if you would like it for the next day.