G'day yojimbo (great name that) 8)
Let me tell you a story about the Korean War.
Troops were offered bright red ruby gemstones which they bought – thinking they would make a killing when the got home.
Turns out the gemstones were plastic and glass – cut into gems from the STOLEN TAIL LIGHTS off their jeeps – Talk about a final con job…
If they don't know what they are doing – don't do it!
Get them tested BEFORE cash changes hands.
Hope that helps.