|
In 2019 a giant raft of this rock measuring more than 50 square miles was found floating in the Pacific near Tonga |
pumice
DD
|
$2,000 |
J |
ROCKS & MINERALS |
2023-04-03 |
#8841 |
|
This lightweight, porous volcanic rock is used in concrete & plaster as well as in abrasives & scouring compounds |
pumice
|
$600 |
J |
GEOLOGY |
2023-01-30 |
#8796 |
|
This rock is basically froth formed from liquid lava |
pumice
|
$800 |
DJ |
GEOLOGY |
2003-09-15 |
#4371 |
|
Pedicurists know a "stone" composed of this abrasive igneous rock helps keep the feet neat |
pumice
|
$600 |
DJ |
ROCKS & MINERALS |
1993-06-24 |
#2044 |
|
To polish teeth, dentists use a powder made from this light-colored volcanic rock |
pumice
|
$1,000 |
DJ |
ROCKS & MINERALS |
1992-10-23 |
#1870 |
|
This white volcanic glass is used in stone or powder form to scour porcelain |
pumice
|
$800 |
DJ |
ROCKS & GEMS |
1990-12-25 |
#1457 |
|
This frothy volcanic glass can float in water for months before disintegrating |
pumice
|
$800 |
DJ |
ROCKS & MINERALS |
1990-04-05 |
#1299 |