Prepare cherries.2. Combine mashed cherries into pot with lemon juice and calcium water. Stir well.3. In a separate bowl combine and mix sugar and pectin powder.4. Over medium-high heat, bring fruit mixture to a boil. Add pectin-sugar mixture. Stir for 1-2 minutes until sugardissolves. Bring to a full boil. Remove from heat.5. Fill prepared jars with jam leaving 1/4 inch headspace. Wipe rims, apply lids, and rings (finger tight). Process jarsin a boiling water bath for 10minutes.6. Remove jars from hot water canner. Let cool on a folded towel. Let set for 12-24hrs.
Notes
To mash tough skinned fruit, combine cherries with 1/2 cup of water and bring to a boil. Simmer 5mins then mash.