You are buying the stone in the photo. This is a single piece. I have separated this particular piece because it is mostly showing copper. Very little Turquoise. This stone is what we call a matrix stone. It is man made. I use this term to refer to stones created out of small pieces of natural material, then bound together with a very hard stone like compound. Something like a very hard resin. You see this type process used in fancy granite, marble or stone counter tops. They look very real and are tough. In this stone you have swirls of copper and aventurine held together by a turquoise colored matrix. . Size is listed in the product title in millimeters (mm)

40x30mm cabochon gemstone Turquoise Flat Back man made copper matrix diy statement necklace bracelet brooch pendant