https://farm8.staticflickr.com/7817/47229499362_206d2b72b2_b.jpg The book says: It can help people to purely think, and think more clearly. Every time I see it, it seems to be able to precipitate my mind. |Gem knowledge| Gem-grade cordierite, English name is Iolite or Dichroite. Iolite is derived from Greek. It is the meaning of "violet" and symbolizes the color characteristics of gem-quality cordierite. Cordierite has obvious pleochroism and is observed from different angles with the naked eye. It can be seen that its color has changed significantly. |About size| ∎Material: Cordierite 2mm, 100% brass, brass beads ∎ Size: total length 4.5CM | We have the best custom service | Welcome to ask the designer, the product can discuss the change clip or pure silver ear You will feel the enthusiasm of the designer for each piece. Every piece of work with the most positive and professional aesthetic attitude |Product packaging| The sterling silver series comes with a piece of "sweet silver" cloth. Comes with a high-quality maintenance zipper bag, a bag of jewelry To encourage environmental protection without causing excessive waste, The packaging is packaged and shipped in a simple manner. If you need gifts or special packaging, you can contact the designer. | How to make jewelry beautiful for a long time | After wearing, use cloth or cotton pad to wipe the sebum attached to the jewelry. It can be stored in a zipper bag to isolate the air on weekdays, reducing the possibility of oxidation.