Mineral deposits can create markings that look like forests or mountains, and experts say each stone is distinctive. By Jill Newman When Tarun Adlakha displays a dendritic agate, with its finely ...

The prospector in Tom Harmon brings him back to the river. He first felt the itch when his grandmother took him rock-hunting as a boy on his father s place at Crane, south of Sidney. On a hill above ...

Jaspers and cherts are the rocks most often confused with Lake Superior agates Lakers formed when mineral-infused solutions seeped into the gas bubbles of volcanic rocks Lake Superior agates are ...

Roula Khalaf, Editor of the FT, selects her favourite stories in this weekly newsletter. Ornamental hard stones such as malachite, turquoise and lapis lazuli have been part of the jewellery vocabulary ...