I have often postulated about a sun wit a gold core instead of an iron one. How would this affect it? It would lack of a magnetic field because gold is not magnetic. How would the visible spectrum be affected?

Phillosophical/Spiritual answer....Perfection. Scientific/Physical realm....Golden pure white.

What Ironcore in What Sun?

Are you being facetious or is that a genuine question Conrad?

a bit of both,but meanwhile I have found that is is the neo-Velikovskyans who are spreading this dubious Information!

If a frog had a glass azz, it would only hop once.

Our sun which started burning hydrogen, creates heavier elements as it ages. Heavy elements also are pulled into the sun by gravity. All of these heavier elements sink to the center, the core.

I was incorrect when I was considering the Sun's magnetosphere. I had equated it to that of the Earth's and what creates it. The Sun's is created by dynamo theory, which proposes a mechanism by which a celestial body such as a star generates a magnetic field. The theory describes the process through which a rotating, convecting, and electrically conducting fluid can maintain a magnetic field over astronomical time scales. I still think stars with a high metallicity.
Elements higher than Iron need special circumstances to form, like supernovae. So, what happens if enough of a heavy element, like gold are present in exceptionally high levels in a star?

Nothing really. A new star is formed from hydrogen. The fusion process burns up the hydrogen into helium, then each element fuses into the next chain of heavier element ending with iron. If the star has sufficient mass, a supernova occurs creating pressures sufficient to form all the heavier elements such as uranium and gold.

Those elements float across space as clouds of dust and gas until sufficient gravitational influence occurs to cause them to fall together and form a new star with a new planetary system, such as our own.

Gold exists in small quantities per unit volume but large quantities overall in much of the solid matter of our solar system. A single metallic asteroid could supply all our precious metal needs forever. The Sun, Jupiter, Earth's core, etc., all contain gold.

A supernova just doesn't make enough gold in concentrated form to cause the concentrations you describe.

~ 0.14 % of the suns mass is iron, ie very little.

I was reading an article on goldmining and it said the visible spectrum would be red and green. So there we have the answer...

A stellar object of the mass of a Star has a mass field of such intensity as to break 'gold' into its component atoms.

That stellar mass also has magnetic fields because of the interaction of atoms at the atomic and sub-atomic levels.

Our star is a fusion furnance not a planatary core. If it was impacted by sufficent 'gold' bearing asteroids I suppose that the 'furnace' output would be contaminated by hard radiation caused by the breakdown of the 'gold' in the stars upper atmosphere.

Would really wreak havoc upon a life zone planet.

Yes, the temps in the sun would not foster gold formation. To my knowledge all of available gold is due to supernova explosion not formation in the sun. I am no expert, but spectrum analysis shows no gold in the sun. It takes larger stars to supernova anyways and during that process is when the gold is formed. Anyone more knowledgeable feel free to add or correct me.