Two Black Obsidian gemstones set in silver and complete with an 18 inch silver chain . Both pendants exhibit a slight cat`s eye effect which means they glint slightly when moved. This is more apparent in the round pendant . The round pendant has a deep silver setting of 9mm , the oval pendant has a more classic setting 3mm in depth 

Right Oval Pendant weight: 11.2 grams   Stone size: 2.2cm x 1 7cm 

Left Round Pendant weight:15.9 grams   Stone size:  2cm round

Obsidian is also called Volcanic Glass due to its smooth appearance . Obsidian is formed as a result of the extremely rapid cooling of lavas extruded during volcanic eruptions.  The rapid cooling does not allow any crystal formation . Most Obsidian is black but if it contains some mineral impurities such as iron or magnesium , a mixed colouration may result as in the deep reds and browns in Mahogany Obsidian .

Obsidian was used by many ancient peoples to make arrow heads and knives as it can be fashioned to create extremely sharp edges. 

Said to assist in decision making and stabilizes the mind.