A Diamond for every finger, and in every shape and size, can be yours with the Linde Simulated Diamonds, newest creation from the Union Carbide laboratories. Right, the Galaxie Castle, a full 29 inches high and 19 inches in diameter, encrusted with a king’s ransom in man-made gems, will be on display in the new Linde Boutique on Jordan Marsh’s Street Floor, Main store, next Monday through Friday. The Galaxie, valued at over $1/2 million, was created by Union Carbide to capture the romance of the enchanted castle and to symbolize the wonderful world of jewelry today.