Peel, core, and quarter your quince, then slice into wedges approximately 1/4" inch thick. Place in a bowl of cold water with a couple tablespoons of lemon juice to prevent excessive browning and oxidation while you work through the fruit.
Drain fruit. Place the prepared quince, lemon juice, sugar, and water in a large, heavy bottom stock pot. Cook over medium heat, stirring frequently for approximately one hour. During this time, the quince will become a deep translucent pinkish orange and quite thick.
Ladle into sterilized half-pint jars, leaving at least 1/2" headspace. Wipe rims clean and place lids and rings on fingertight. Process in a water bath canner at a rolling boil for 15 minutes.
After processing, remove jars from canner and place on a towel to cool. Loosen or remove rings and check for seal. Store in a cool dark place for up to a year. Refrigerate after opening.