Specific Meaning 7A-Grade Beads

Quality of natural gems in the market is generally divided into 1A~7A grade

★ The prerequisite for entering the level classification is 100% natural stone, no any artificial process such as dyeing, baking, chemical treatment, etc. except polishing.

★ Grade can be divided from aspects such as transparency, purity, and color saturation. The higher the grade, the better the quality.

Here, taking aquamarine as an example to show different grades