I wonder if the strands in the quartz might be tourmaline. Have you got a photo you can post?
I know that rutile can also produce strands inside quartz stones, but those are normally light in color.
Quartz in and of itself is a great stone to start any collection. It resonates with all chakras and contains a clean, clear energy that helps us on multiple levels.
If the strands in the quartz are another type of crystal, then the stone you're carrying will benefit from the metaphysical properties of that other mineral, as well (which is why it's helpful to be able to identify what the strands are made of).
Congrats on your new crystal.