Grey Shore Heart

Documented with your piece

Stone Passport

Edition

Tide No. 029 · 1 of 1

Likely stone identification

Likely quartzite or fine sandstone

Identification confidence

Likely — visual identification

Origin

Found in Sea Isle City, NJ

Natural characteristics

Silica-rich and hard (around 7 on the Mohs scale), with a glassy to sugary surface. Water-rounded edges, a sand-worked skin, and internal veining or fractures that cannot be reproduced.

Possible geological age

Depending on the source rock, quartz and quartzite material may have a geological history stretching back hundreds of millions of years, and some mineral material can be more than a billion years old. The exact age of this stone is unknown.

Stone type is a visual identification made on the shore, not a laboratory result. Exact mineral identity and geologic age cannot be guaranteed from appearance alone without laboratory or geological testing.