Stones are characterized by durability and hardness and have different strength, weight, colour and general appearance. They have been used by mankind throughout history. Here you can see some of them. Calvendo calendars are premium products - a bit more pricey than others but with added benefits: Our calendars always look beautiful on your wall because we produce them locally with premium paper and sophisticated spiral binding, ensuring easy turning of pages and flat hanging against the wall. A protective transparent plastic cover sheet provides added stability and each calendar comes in five languages. Treat yourself to a Calvendo calendar and you get something that looks better all year round. This successful calendar was re-released this year with the same pictures and updated calendar.