|Dimensions (mm)||not provided|
|Weight (carats)||not provided|
RUTILATED QUARTZ 'STAR BURST'
This is a natural stunning rough specimen displaying gold needles.This is a interesting stone in that the needles radiate from one spot so its called a star burst-usually from a mica centre-great collectors stone.You have to process kilos of this material just to find the star.
Mined in Brazil
Weight 170 cts app
Size 40X27X26 mm app
We have taken the picture with the stone wet.We have also used a yellow light to try and show the "star burst'
Quartz is the most common mineral on Earth. It is found in nearly every geological environment and is a component of almost every rock type. It makes up about 12% of the earth's crust, occurring in a wide variety of igneous, metamorphic and sedimentary rocks. It is also the most varied in terms of variety and color. Quartz is a 7 on the Mohs scale of hardness.
Rutilated quartz is found in Australia, Brazil, Kazakhstan, Madagascar, Norway, Pakistan and the United States.
Rutile is a major ore of titanium, which is a metal used for high tech alloys. It often forms needle-like crystal inclusions inside quartz. This form of quartz is known as rutilated quartz and it looks like small bars of imbedded needles. Rutile is a 6 on the Mohs scale.
Because of the difference in hardness between the two materials and because of the way rutile forms inside, this can be a difficult stone to attain a smooth surface without pits.
|Starts||18th Aug 2012 10:39pm PDT|
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