Small Gold Ingot + Personal Furnace = Liquid Gold

Liquid Gold + Wire Drawing Machine = Gold Filigree Wire

Gold Filigree Wire + Generic Ring Template = Gold Filigree Ring

Dark Biotech Rod + Gold Filigree Ring = Dark Biotech Rod Ring

6* the QL of the rod in ME and EE needed to combine the final stage.

I assume this works for all the types of rod (can see 3 in the db, dark, glowing, pulsing, all with similarly named rings)

Stats for rings at ql300:

Dark: hp100, pm15, ts15, mc10, xp 4%, INT 8

Glowing: hp100, pm15, si15, mc10, xp 4%, INT 8

Pulsing: hp100, mm15, bm15, mc10, xp 4%, INT 8

The rings have Alien Tech Expertise perk reqs to wear.

Ok, Gold must be 80% of Rod ql then; similar to many other tradeskills.

Smen

Tradeskills seems partially buged. Got a gold filigree Ring & Pulsing Rod thing but the tradeskill window says the result will be a dark biotech rod ring

ql223 Pulsing Biotech Rod + ql240 Platinum Filigree Ring = It is not possible to assemble those two items.

ql223 Pulsing Biotech Rod + ql200 Gold Filigree Ring = ql223 Dark Biotech Rod Ring.

Just made a QL242 Pulsing Biotech Rod Ring from the raw materials. Doesn't seem to be bugged.

There are also several in player shops. Therefore I guess the bug is fixed. FYI.

Ps. Even though it's said to require AI Tech 3, I put it on when I only have AI Tech 2

High level Rk missions are probably the best bet for finding ql 240+ gold. Bosses drop them sometimes, and MA-type mobs often drop metals & gems, so there's a chance there as well. Not the easiest source of materials, and no certainty of finding what you're after, but it's a start at least