Sweetwater Agate Tumbles #2 measure approximately 1 1/16" to 1 7/16" (27mm to 37mm) and weigh approximately .6 to .8 ounces (14.1 to 20.1 grams). These fluoresce green. Please let me pick one for you. These are $2.00 USD each.
(Healing Crystal)
Hardness: 7.0
Origin: Colorado
Dendritic Agate according to Melody, technically contains black particles that are probably Manganese (i.e., Pyrolousite), in either clear or translucent Agate. The Agate is most often lighter colors and has black particles inside. Sometimes the "dendrites" make beautiful patterns within the crystal (i.e., landscape scenes).
Dendritic Agate can bring out your gentle side and encourage you to trod lightly through life, taking the time to live each moment in joy. The word "enjoy" should actually be spelled "in-joy".