I have spent endless hours in a geology lab and a few pics make it hard to determine. Off the cuff my first point is the crystalline structure that appears...??...
"Rutilated quartz is quartz stone with rutile enclosures. Rutile is a mineral that is made up mostly of titanium dioxide, or TiO2. As a mineral, it's very high on the refractive index and disperses more than almost any other mineral. This means that, when it appears in other minerals, it almost always appears in long, thin shots of color. Rutilus is, in fact, the Latin word for red, and the mineral gained its name because some specimens are a lovely deep red color. It can also appear in brown and gray tones."
"Quartz is one of the most common mineral on Earth, and it makes up over 10% of the planet's crust. Furthermore, quartz is quite widespread and can be found in almost every geographical environment. It is understandable that such an abundant mineral comes in a number of variations. These include rose quartz, smoky quartz, and rutilated quartz. Members of quartz family can be found as far apart as Brazil, Madagascar, Australia, Norway, Kazakhstan, and Pakistan. It can also be found in the United States, where many mountain ranges contain large deposits".
If you have a detector simply run it over the specimen. That will give you a hint. The quartz has also an agate look to it. It is hard to tell for sure from the pics.....thus I can't help you much. Location of the find may bring some bearing to the sample.
Bejay
