A variety native to Russia, its translation from Russian reads: "Stone heart/flint".

Synonyms: Kamennoe Serdce - Stone heart - Каменное сердце.

Purple-red fruit, firm and glossy. Usually 200 to 400 grams, blunt cordate type.

Juicy, fleshy and dense beefy flesh. Excellent, balanced heirloom-tomato flavor.

Plant with small stems but great development, regular fine, drooping foliage, indeterminate growth.

Very good mid-season production, up to 5kg/plant.

Good fruit keeping after harvesting.