IT IS A STONE (IT COULD BE A DIAMOND OR ANOTHER STONE SUCH AS ZIRCON, SAPPHIRE, RUBY, EMERALD, ONYX, OR OTHER) SET IN ANOTHER STONE (DIAMOND, SAPPHIRE, RUBY, EMERALD, ONYX, OR OTHER). THE CONCEPT IS TO SUPERIMPOSE A STONE ON ANOTHER WORKED STONE IN SUCH A WAY AS TO RECEIVE IT INSIDE. THE ORIGINALITY LIES IN THE FACT OF PRODUCING AN OBJECT FORMED BY THE ASSEMBLY OF TWO STONES PERFECTLY SET ONE INSIDE ANOTHER SO AS TO PRODUCE AN EFFECT OF DOUBLE PRECIOUSNESS AS IT ENCLOSES TWO OBJECTS IN ONE.