Diablo II: Resurrected

@TheMorphi , yep, a Magic Amulet is a blue one

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Just FYI:
I put in a blue level 30 amulet with each of the different 6 perfect gems, on Nightmare difficulty, and the result was,

Blue, Level 31 Amulet,
+5 minimum damage,
All Resistances +16.

And achievement unlocked.

It doesnt Work for me. But i dont know why. 🤷🏻
Is there a Minimum Item lvl for the Amulett which is used?

I'm trying now with a "Plauge Emblem Amulet" that's effects prior to fusion are;
Req lvl 15
10% chance to cast lvl 3 charged bolt when struck
+1 curses (Necro only)
+1 Strength
Replenish Life +9
+9 Maximun Stamina

It's not letting me, I've beaten the game on easy and am a level 41 Necromancer. I just beat the 4th quest in Act one and feel like it should have worked...

Switching Amulets to a lesser quality one we have the Amulet Of Absorption; I'm now level 42 and have completed all but the Andy quest for Act 1.
Req level 19
Damage reduced by 3

It worked! My first Amulet must have been to good. It was that tan/sandy gold coloring instead of blue. The results are;
Prismatic Amulet
Req level 31
All Resistances +19

I got that amulet by simply mixing rings in the Cube.

Would have been nice to know, that the old Amulet gets "destroyed" in the process. I was hoping to add the "All Resistances +19" to my Amulet. But you get a completely new one.

To address the first comment for anyone in the future: Magic items are the blue text non-named items. Yellow items with a special name are rare. You need to use a magic item for this recipe. Yes, it will destroy the original amulet, though most magic amulets are very low tier anyway, unless they have +skills on them.