The "Other" category in loose gems is getting filled up with gems that could be grouped together along with very closely related gems. In the case of gems that are all forms of quartz, it would seem to simplify things were they all grouped as subcategories under Quartz. Something on the order of the subcategories below would take care of all the main quartz gems:
Loose Diamonds & Gemstones/Quartz/Agate
Loose Diamonds & Gemstones/Quartz/Amethyst (purple)
Loose Diamonds & Gemstones/Quartz/Ametrine
Loose Diamonds & Gemstones/Quartz/Aventurine
Loose Diamonds & Gemstones/Quartz/Carnelian
Loose Diamonds & Gemstones/Quartz/Chalcedony
Loose Diamonds & Gemstones/Quartz/Chert and Flint
Loose Diamonds & Gemstones/Quartz/Chrysoprase
Loose Diamonds & Gemstones/Quartz/Citrine (yellow-orange)
Loose Diamonds & Gemstones/Quartz/Eisenkiesel or Hematoid (red)
Loose Diamonds & Gemstones/Quartz/Heliotrope or Bloodstone
Loose Diamonds & Gemstones/Quartz/Included/Rutilated
Loose Diamonds & Gemstones/Quartz/Included/Phantom & Negative
Loose Diamonds & Gemstones/Quartz/Included/Tourmalinated
Loose Diamonds & Gemstones/Quartz/Included/Other
Loose Diamonds & Gemstones/Quartz/Jasper
Loose Diamonds & Gemstones/Quartz/Milky (white)
Loose Diamonds & Gemstones/Quartz/Morion (near black)
Loose Diamonds & Gemstones/Quartz/Onyx (layered)
Loose Diamonds & Gemstones/Quartz/Prase (green)
Loose Diamonds & Gemstones/Quartz/Raw Crystals
Loose Diamonds & Gemstones/Quartz/Rock Crystal (colorless)
Loose Diamonds & Gemstones/Quartz/Rose (pink)
Loose Diamonds & Gemstones/Quartz/Sard (red brown)
Loose Diamonds & Gemstones/Quartz/Smokey (brown)
Loose Diamonds & Gemstones/Quartz/Tiger's Eye & Hawk's Eye
For me, this would make it easier to search related stones. The same could be done with the beryls (aquamarine, emeralds, etc.) and feldspars (labradorite, moonstone, sunstone, etc.) and garnet (almandine, hessonite, rhodolite, etc.) and I'd be happy to provide a list of subcategories for those if you see value in grouping the gem types under the main group headings. Thanks.