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Myterra Gemstone C35.SEPT.19: 35mm Septarian Sphere Cabinet Knob with Matte Black base. Septarian spheres started out millions of years ago as balls of mud from ancient oceans, forming calcite, aragonite and limestone in a 7-point cracking pattern unique to this stone.

• Myterra sources gem & mineral stones from all over the world.
• Each knob is a unique creation of Earth’s art with natural variations in size, pattern and hue, therefore, no two knobs will be exactly alike.
• Given dimensions are nominal, expect minor variations.
• Includes one 1″ mounting screw.
• Clean with water and mild soap only, no chemicals or alcohol.
• Interior use only and exposure to direct sunlight is not recommended.
• Not recommended for use where temperatures are less than 34 degrees Fahrenheit.