Precast reinforced and prestressed concrete frames provide a high strength, stable, durable and robust solution for any multi-storey structure, and are widely r
An authoritative introduction to all aspects of lapidary is provided here by Pansy Kraus. She describes the processes, tools, and equipment of each branch of th
A comprehensive dictionary of sacred and magical gem lore that draws on the rarest source texts of Antiquity and the Middle Ages • Reveals the healing and mag
A Medieval Book of Magical Stones is the first translation of the longest and most comprehensive medieval English treatise on the occult powers of stones and ge