Purple Dendritic Opal 8mm Round - 15-16 Inch Lapis Lazuli Moss Agate is a variety

Moss Agate is a variety of Chalcedony

is transparent quartz crystal with brilliant sparkle

and an Amazonite ring was found among the treasures in King Tutankhamun’s tomb

From Brazil

It is believed by some to improve memory and increase analytical skills

Purple Dendritic Opal 8mm Round - 15-16 Inch Lapis Lazuli Moss Agate is a varietyThis variety of opal is named "dendritic" for the small inclusions within it that resemble moss or ferns. These inclusions consist of iron, manganese and other metallic oxides captured during the forming of the rock. Opals are hydrated amorphous forms of silica, created when silica hardens within the fissures of other stones.