igneous
Wishing Stone (Basalt with Quartz Vein)
Basalt with Hydrothermal Quartz Infill (SiO2)
Hardness: 6-7 (Basalt) and 7 (Quartz); Color: Dark grey to black matrix with a white or cream stripe; Luster: Dull/earthy (matrix) to vitreous (vein); Texture: Fine-grained/aphanitic; Shape: Smooth river-worn or beach-worn pebble.
- Hardness
- 6-7 (Basalt) and 7 (Quartz)
- Color
- Dark grey to black matrix with a white or cream stripe
- Luster
- Dull/earthy (matrix) to vitreous (vein)
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Physical properties
Hardness: 6-7 (Basalt) and 7 (Quartz); Color: Dark grey to black matrix with a white or cream stripe; Luster: Dull/earthy (matrix) to vitreous (vein); Texture: Fine-grained/aphanitic; Shape: Smooth river-worn or beach-worn pebble.
Formation & geological history
Formed from cooling lava (basalt) that later developed fractures. These fractures were filled by silica-rich hydrothermal fluids that crystallized into quartz. The rounded shape is the result of water erosion in rivers or oceans.
Uses & applications
Primarily collected as a curiosity, pocket stone, or for lapidary use. In folklore, they are used as 'wishing stones' or charms.
Geological facts
A 'wishing stone' is defined by a single continuous white line that circles the entire rock. Legend says if you make a wish and throw it into the sea, or give it to someone else, the wish will come true.
Field identification & locations
Identified by searching for smooth, dark pebbles with a distinct, singular white line encircling the stone. They are common on volcanic coastlines and rocky riverbeds globally.
