There will indeed be fusions, at least 2-gem fusions, I just need spare time to fill all these in as well as the weapons they would use.

Aquamarine + Emerald = Apatite, Weapon: Ranseur
Aquamarine + Amber = Citrine, Weapon: Lucerne Hammer
Aquamarine + Spinel = Kyanite, Weapon: Ranged weapons are hard to fuse give me time
Aquamarine + Howlite = Moonstone, Weapon: Halberd
Aquamarine + Zircon = Serendibite, Weapon: Guisarme
Aquamarine + Evenkite = Prehnite, Weapon: Lance
Aquamarine + Sodalite = Tanzanite, Weapon: Sodalite's weapon is difficult too, also need more time
Emerald + Amber = Jade, Weapon: Greatsword
Emerald + Spinel = Aventurine, Weapon: Erm...
Emerald + Howlite = Diopside, Weapon: Lochaber Axe
Emerald + Zircon = Hematite, Weapon: Dual-Sided Sword
Emerald + Evenkite = Moldavite, Weapon: Voulge
Emerald + Sodalite = Chrysocolla, Weapon: ???
Amber + Spinel = Spodumene, Weapon: ???
Amber + Howlite = Chrysoberyl, Weapon: Giant Hammer + Giant Axe = Umm... Gianter thing
Amber + Zircon = Andesine, Weapon: 
Amber + Evenkite =
Amber + Sodalite =
Spinel + Howlite =
Spinel + Zircon = Onyx, Weapon:
Spinel + Evenkite =
Spinel + Sodalite =
Howlite + Zircon =
Howlite + Evenkite =
Howlite + Sodalite =
Zircon + Evenkite =
Zircon + Sodalite =
Evenkite + Sodalite =