Aquamarine 4mm Round AAA Grade - 15-16 Inch Rock Crystal It is a particularly unusual

It is a particularly unusual gem because it exhibits a special optical property known as tenebrescence

At this time

often called the "Super Seven" or "Melody Stone" contains Amethyst

slight variations in color

Aquamarine 4mm Round AAA Grade - 15-16 Inch Rock Crystal It is a particularly unusualAquamarine is a transparent to translucent stone ranging from cerulean blue to light blue in higher grades. In lower grades it can be transparent to opaque and is commonly light blue, green and yellow with white and gray inclusions. The name is the Latin term for water of the sea. Aquamarine was once thought to be the treasure of mermaids, as well as a lucky stone for sailors.