I started this post in another thread but felt it would be better suited in it's own thread. I will continue to build this database of results as long as I have the money to fund it
Also, I have yet to combine more Lvl 2 gems as I have only got eva and hit rate level 2 gems left and do not wish to ruin them

I'll continue the Lvl 2 gem testing when I can get a hold of more.
Enhanced stabilizers:
(Gem) x2
Garnet Lvl 1 x2 = Lvl 2 Amethyst
Turquoise Lvl 1 x2 = Lvl 2 Amber
Amethyst Lvl 1 x2 = Lvl 2 Ruby
Ruby Lvl 1 x2 = Lvl 2 Turquoise
Emerald Lvl 1 x2 = Lvl 2 White Pearl
Sapphire Lvl 1 x2 = Lvl 2 Turquoise
Sapphire Lvl 1 x2 = Lvl 1 Turquoise
Diamond Lvl 1 x2 = Lvl 1 Black Pearl
Diamond Lvl 1 x2 = Lvl 1 Aquamariness
Turquoise Lvl 1 x2 = Lvl 1 Opals
Sapphire Lvl 1 x2 = Lvl 1 Amethyst
Sapphire Lvl 1 x2 = Lvl 1 Amethyst
Jade Lvl 1 x2 = Lvl 1 Amber
Jade Lvl 1 x2 = Lvl 1 Amber
Topaz Lvl 1 x2 = Lvl 1 Diamond
Garnet Lvl 1 x2 = Lvl 1 Garnet
Ruby Lvl 1 x2 = Lvl 1 Jade
Amber Lvl 1 x2 = Lvl 1 Garnet
Aquamarine Lvl 1 x2 = Lvl 1 Turquoise
White Pearl Lvl 1 x2 = Lvl 1 Amber
Black Pearl Lvl 1 x2 = Lvl 1 Amethyst
Opal Lvl 1 x2 = Lvl 1 Jade
Garnet Lvl 1 x2 = Lvl 1 Ruby
Garnet Lvl 1 x2 = Lvl 1 Turquoise
Aquamarine Lvl 1 x2 = Lvl 1 Turquoise
Aquamarine Lvl 1 x2 = Lvl 1 Aquamarine
Topaz Lvl 1 x2 = Lvl 1 Ruby
Ruby Lvl 1 x2 = Lvl 1 Sapphire
Topaz Lvl 1 x2 = Lvl 1 Opal
Opal Lvl 1 x 2 = Lvl 1 Sapphire
Amber Lvl 1 x2 = Lvl 1 Topaz
Sapphire Lvl 1 x2 = Lvl 1 Ruby
Jade Lvl 1 x2 = Lvl 1 Amber
(Gem Lvl 1) + (Gem Lvl 1)
Topaz Lvl 1 + Diamond Lvl 1 = Lvl 2 Amber
White Pearl Lvl 1 + Amber Lvl 1 = Lvl 2 Garnet
Turquoise Lvl 1 + Topaz Lvl 1 = Lvl 2 Amethyst
Turquoise Lvl 1 + Ruby Lvl 1 = Lvl 2 Diamond
Ruby Lvl 1 + Amber Lvl 1 = Lvl 2 Black Pearl
Topaz Lvl 1 + Garnet Lvl 1 = Lvl 2 Aquamarine
Turquoise Lvl 1 + Emerald Lvl 1 = Lvl 2 White Pearl
Ruby Lvl 1 + Amber Lvl 1 = Lvl 2 Garnet
Turquoise Lvl 1 + Emerald Lvl 1 = Lvl 2 Jade
Jade Lvl 1 + Turquoise Lvl 1 = Lvl 2 Sapphire
Diamond Lvl 1 + Garnet Lvl 1 = Lvl 2 Garnet
Aquamarine Lvl 1 + White Pearl Lvl 1 = Lvl 2 Amber
Aquamarine Lvl 1 + Opal Lvl 1 = Lvl 2 Ruby
Amethyst Lvl 1 + Turquoise Lvl 1 = Lvl 2 Topaz
Amethyst Lvl 1 + Topaz Lvl 1 = Lvl 2 Black Pearl
Amber Lvl 1 + Ruby Lvl 1 = Lvl 2 Diamond
Diamond Lvl 1 + Turquoise Lvl 1 = Lvl 1 Diamond
Diamond Lvl 1 + Garnet Lvl 1 = Lvl 1 White Pearl
Sapphire Lvl 1 + Topaz Lvl 1 = Lvl 1 Sapphire
Sapphire Lvl 1 + Ruby Lvl 1 = Lvl 1 Opal
Topaz Lvl 1 + Emerald Lvl 1 = Lvl 1 Amber
Amber Lvl 1 + Amethyst Lvl 1 = Lvl 1 Garnet
Amber Lvl 1 + Garnet Lvl 1 = Lvl 1 Diamond
Ruby Lvl 1 + Garnet Lvl 1 = Lvl 1 Garnet
Amber Lvl 1 + Topaz Lvl 1 = Lvl 1 Ruby
Jade Lvl 1 + Amber Lvl 1 = Lvl 1 Jade
Diamond Lvl 1 + Garnet Lvl 1 = Lvl 1 Turquoise
Garnet Lvl 1 + Turquoise Lvl 1 = Lvl 1 Amethyst
Garnet Lvl 1 + Turquoise Lvl 1 = Lvl 1 Sapphire
Diamond Lvl 1 + Sapphire Lvl 1 = Lvl 1 Sapphire
Sapphire Lvl 1 + Emerald Lvl 1 = Lvl 1 Aquamarine
Emerald Lvl 1 + Ruby Lvl 1 = Lvl 1 Opal
Turquoise Lvl 1 + Ruby Lvl 1 = Lvl 1 Black Pearl
Turquoise Lvl 1 + Ruby Lvl 1 = Lvl 1 Turquoise
Turquoise Lvl 1 + Sapphire Lvl 1 = Lvl 1 Jade
Jade Lvl 1 + Garnet Lvl 1 = Lvl 1 Turquoise
Jade Lvl 1 + Turquoise Lvl 1 = Lvl 1 Amber
Garnet Lvl 1 + Diamond Lvl 1 = Lvl 1 Turquoise
Garnet Lvl 1 + Amber Lvl 1 = Lvl 1 Garnet
Black Pearl Lvl 1 + Opal Lvl 1 = Lvl 1 Black Pearl
Opal Lvl 1 + Black Pearl Lvl 1 = Lvl 1 Ruby
Opal Lvl 1 + White Pearl Lvl 1 = Lvl 1 Opal
Opal Lvl 1 + Diamond Lvl 1 = Lvl 1 Opal
Opal Lvl 1 + Amethyst Lvl 1 = Lvl 1 Diamond
Aquamarine Lvl 1 + White Pearl Lvl 1 = Lvl 1 Ruby
Aquamarine Lvl 1 + Black Pearl Lvl 1 = Lvl 1 Amber
Amethyst Lvl 1 + Aquamarine Lvl 1 = Lvl 1 Sapphire
Amethyst Lvl 1 + Sapphire Lvl 1 = Lvl 1 Garnet
Amethyst Lvl 1 + Garnet Lvl 1 = Lvl 1 White Pearl
Amethyst Lvl 1 + White Pearl Lvl 1 = Lvl 1 Aquamarine
Amethyst Lvl 1 + Black Pearl Lvl 1 = Lvl 1 Opal
Amethyst Lvl 1 + Opal Lvl 1 = Lvl 1 Aquamarine
Ruby Lvl 1 + Amber Lvl 1 = Lvl 1 Garnet
Jade Lvl 1 + Ruby Lvl 1 = Lvl 1 Garnet
Amethyst Lvl 1 + Black Pearl Lvl 1 = Lvl 1 Ruby
Aquamarine Lvl 1 + Black Pearl Lvl 1 = Lvl 1 Aquamarine
Aquamarine Lvl 1 + Turquoise Lvl 1 = Lvl 1 Amber
Sapphire Lvl 1 + Topaz Lvl 1 = Lvl 1 Topaz
Diamond Lvl 1 + Ruby Lvl 1 = Lvl 1 Garnet
Diamond Lvl 1 + Turquoise Lvl 1 = Lvl 1 Aquamarine
Diamond Lvl 1 + Turquoise Lvl 1 = Lvl 1 Amethyst
Diamond Lvl 1 + Turquoise Lvl 1 = Lvl 1 Aquamarine
Garnet Lvl 1 + Amber Lvl 1 = Lvl 1 Black Pearl
Amber Lvl 1 + Ruby Lvl 1 = Lvl 1 Black Pearl
Amethyst Lvl 1 + Diamond Lvl 1 = Lvl 1 Ruby
Aquamarine Lvl 1 + Diamond Lvl 1 = Lvl 1 Emerald
Emerald Lvl 1 + Diamond Lvl 1 = Lvl 1 Emerald
Emerald Lvl 1 + Ruby Lvl 1 = Lvl 1 Jade
Jade Lvl 1 + Diamond Lvl 1 = Lvl 1 Sapphire
Sapphire Lvl 1 + Ruby Lvl 1 = Lvl 1 Jade
Amber Lvl 1 + Jade Lvl 1 = Lvl 1 Amethyst
Amber Lvl 1 + Amethyst Lvl 1 = Lvl 1 Jade
White Pearl Lvl 1 + Jade Lvl 1 = Lvl 1 Black Pearl
Black Pearl Lvl 1 + White Pearl Lvl 1 = Lvl 1 Sapphire
Amethyst Lvl 1 + Sapphire Lvl 1 = Lvl 1 Diamond
Emerald Lvl 1 + Aquamarine Lvl 1 = Lvl 1 Emerald
Emerald Lvl 1 + Topaz Lvl 1 = Lvl 1 Diamond
Black Pearl Lvl 1 + Diamond Lvl 1 = Lvl 1 White Pearl
And the one that everyone is wondering....
(Gem Lvl 2) x2
Opal Lvl 2 x2 = Lvl 2 Ruby
(Gem Lvl 2) + (Gem Lvl 2)
Turquoise Lvl 2 + Jade Lvl 2 = Lvl 2 Aquamarine
Jade Lvl 2 + Turquoise Lvl 2 = Lvl 2 Garnet
Garnet Lvl 2 + Emerald Lvl 2 = Lvl 2 White Pearl
Aquamarine Lvl 2 + Black Pearl Lvl 2 = Lvl 2 Opal
Amethyst Lvl 2 + Aquamarine Lvl 2 = Lvl 2 Diamond
Black Pearl Lvl 2 + Diamond Lvl 2 = Lvl 2 Turquoise
Black Pearl Lvl 2 + Turquoise Lvl 2 = Lvl 2 Jade
Amber Lvl 2 + Diamond Lvl 2 = Lvl 2 Emerald
Emerald Lvl 2 + Garnet Lvl 2 = Lvl 2 Aquamarines
Sapphire Lvl 2 + Jade Lvl 2 = Lvl 2 Turquoise
Garnet Lvl 2 + Turquoise Lvl 2 = Lvl 2 Black Pearl
Ruby Lvl 2 + Topaz Lvl 2 = Lvl 2 Diamond
Amber Lvl 2 + Diamond Lvl 2 = Lvl 2 Amber
Ruby Lvl 2 + Amber Lvl 2 = Lvl 2 Aquamarine
Turquoise Lvl 2 + Diamond Lvl 2 = Lvl 2 Emerald
Amber Lvl 2 + Jade Lvl 2 = Lvl 2 Topaz
Aquamarine Lvl 2 + Amethyst Lvl 2 = Lvl 2 Sapphire
Sapphire Lvl 2 + Topaz Lvl 2 = Lvl 2 Opal
Notes:
- These are not all my results as I've made a few attempted upgrades before starting this list.
- After further testing, I have found that it is not possible to get multiple gems from one upgrade attempt. I apologize for my misleading information.
- [OLD]There might have been some confusion when I received my upgrade gems. I might or might not have made a mistake when I counted the multiple gems. From this update on, I'll be careful to make sure I record the right amount of gems I receive. The numbers and stats I list above with be held correct by myself until I finish further testing.