Classification of crystals According to color Crystals can be divided into colored crystals and colorless crystals. Purple, yellow, pink, green and blue are colored crystals, while black, milky white, brown and colorless are colorless crystals. ...

Natural crystal is a crystallized mineral made of quartz, which is the purest gem in the world. Crystal gathers the essence of heaven and earth, is transparent and colorful, and has a certain positive energy. ...

Some say crystal symbolizes pure and selfless motherly love, some say crystal embodies pure and loyal love, the "crystal love". In any case, we can see from here that people keep very beautiful feelings for ...

Using an inverter with a 12 volt battery is a convenient way to power electronic devices in situations where there is no access to an AC power outlet. However, it is essential to know how ...