Another challenge. But wow so unusual. Colours amazing. Thanks again
|Dimensions (mm)||34 x 31 x 18mm|
|Weight (carats)||80 carats|
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 80.00 cts app
Size 34 x 31 x 18 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||17th Oct 2017 9:08pm PDT|
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