Dendrite Opal is mined in Australia and has dendritic inclusions that look like ferns and marble. These inclusions are made of different metallic oxides, like iron or manganese. Each stone is almost an inch wide. Sterling Thai beads that are embossed with flowers and leaves separate each gemstone. The focal Thai bead is also embossed on both sides and is 1 1/4" in circumference. Three 10mm rutilated quartz gemstones sit at the back of the neck for comfort and ease of using the clasp. This piece measures 20" around the neck and has a 2" sterling extension chain. All silver is sterling. The weight of this piece is evenly distributed and does not feel heavy on the neck. Wear this with anything from casual to dressy! One of a kind.