The natural golden threads are called Routile, sometimes called golden angel's hair!

The sizzling power of the threads of gold rutile will bring through intense energy, and combined with the quartz, create an amazing vibration."
(https://www.healing-crystals-for-you.com/golden-rutilated-quartz.html)

Check out beautiful gold rutilated quartz pendant EAPD091020-01

Stones: Golden Rutilated Quartz

Dimensions: Irregular stones of different sizes, center stone is 5/8" long x 3/8" wide x 1/4" depth

Length: 7 3/4"-8 3/4"

Material: .925 Sterling Silver

Made in: India

Sparkling Faceted Golden Rutilated Quartz Sterling Silver Bracelet

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