A/N: I went a bit alternative on this prompt. I hope it makes sense.
Prompt from Book girl fan: Modern AU
Gold
It sparkled under the light with a warm radiance that captivated the viewer.
"Gorgeous!"
"It must have been expensive."
"A modern design. I wonder what jeweller crafted it?"
Mary smiled as her friends admired her wedding band. The ring was expertly crafted. The bevelled edge work against the simple curve was elegant.
Even Holmes praised her ring. (She suspected he'd also helped Watson in his choice). "Gold, abbreviation Au, atomic number 79. It is a rare metal that is malleable, one of the least reactive of metals, and solid in standard conditions. It is also resistant to most acids." He glanced up. "It suits you, Mary."
She sparkled under the light with a warm radiance that captivated the viewer.