♦ Product Name: 925 sterling silver ore collection [Kyanite ore necklace] ♦ Material: 925 sterling silver, kyanite (approx. 0.3 x 3 cm) ♦ Size: Chain length 16吋 ♦ Kyanite Moore Hardness: Equivalent C-axis direction: 4-5; Vertical C-axis direction: 6-7, please do not slam ♦ Gem size: Each gem is unique, please confirm the size and shape by private ♦ If there is a spot order, then you can ship the product. If there is no suitable size, you can place a single order. The production time is about 7-15 days. ★ All the items in the picture may have a color difference due to factors such as light or the resolution of the computer screen. ★ Handmade can not be as precise and perfect as the machine, natural materials can not be exactly the same, unacceptable persons do not order! [Silverware maintenance and preservation method] 1. After the silver jewelry is worn, it can be wiped with a cotton cloth or tissue to wipe the surface, remove the moisture and dirt, and then store it in a sealed bag to avoid contact with air. The surface brightness is reduced. 2. Do not wear other metal jewelry at the same time when wearing silver jewelry so as not to scratch or deform. 3. The best maintenance method for silverware is to wear it every day, because the body oil can produce natural moist luster. (But it's best not to take a bath) 4. Keep the silverware dry and do not wear swimmers to avoid contact with sulfur-containing hot springs and seawater. 5. Silverware that is processed by vulcanization (ie deliberately blackened silverware), please avoid deliberately wiping the light, nor wash with silver wash. 6, if the silver polishing cloth can be wiped clean, please do not wash with silver wash water, because the silver wash water is a chemical composition more damage silverware, so you can try to wipe with silver can not wipe. ※ Small silver polishing cloth The silver cloth can not be washed, nor can you use it to wipe the glasses. Because there are some polishing powders on the silver cloth, there is no effect after washing.