He's very stuck on the word hollow, which seems to have this very negative term in the jewellery industry, Hollow gold = cheap and nasty.
My mom had some solid gold necklace and ear rings, but she also once bought a hollow gold necklace. It was bigger than the necklaces she usually wore (if that thing had been solid, I shudder to think how much that would have weighed!), and certainly you could tell the difference in quality between it and the solid gold chains, but it was a fun, and in its own way nice and tasteful necklace. My mom would wear it for more casual occasions than she would her solid gold ones. Oh, but I believe the most expensive thing she had was the long pearl string necklace. That thing looked very tasteful and luxurious whenever she wore it.
Watch as thin hollow egg shell. The Edition will likely contain 31g to 62g of gold.