|
With 1 being the softest on the Mohs scale of hardness, this substance consisting primarily of silica is the index mineral for 7 |
quartz
|
$1,600 |
DJ |
THAT'S JUST SCIENCE, MAN |
2022-03-07 |
#8591 |
|
When exposed to electricity, this mineral vibrates at regular intervals, so it's used in wristwatches to keep accurate time |
quartz
|
$400 |
DJ |
SCIENCE |
2019-04-12 |
#7970 |
|
Citrine is a yellow variety of this mineral |
quartz
DD
|
$2,000 |
DJ |
SCIENCE IS GOLDEN |
2010-10-19 |
#6002 |
|
Many of the gems sold as topaz are actually the citrine variety of this stone |
quartz
|
$1,000 |
DJ |
SCIENCE |
1992-09-28 |
#1851 |
|
Crystals of this mineral are used in wave transmitters of radio & TV sets |
quartz
|
$600 |
DJ |
SCIENCE |
1992-09-11 |
#1840 |
|
Found worldwide, this, possibly the most common of all minerals, includes forms such as the agate |
quartz
|
$1,000 |
DJ |
PHYSICAL SCIENCE |
1987-04-08 |
#608 |