The Color Yellow
Always Yellow: Citrine, Heliodor (Golden Beryl), Hyacinth (Yellow Zircon), Lemon Jade & Yellow Jade (Serpentines*), Lemon Quartz,
Sometimes Yellow: Amber, Aventurine, Beryl, Chrysoberyl, Diamond, Fluorite, Jasper*, Sapphire, Sinhalite, Sunstone, Topaz, Tourmaline
Rutilated Quartz (second photo above) is an example of how inclusions may not always be flaws but instead produce a unique and beautiful gemstone.
Note: See posts about the colors Brown and Orange to find gems in darker shades containing yellow.
* May be variegated.