Information typically trade secret.
Industry traders always makes insider deals and seller might get certain amount but if greedy fails in trade.
Doubt they would get $8.5 million.
They might want amount reality based on buyers willing to sell above need.
Always ask seller what is need versus what is want.
Two very different results occur.
I bought AAA heat treated rubies yes treated for $18 each via Burma bought 2 lots in auction not best grade of AAAA.
Bought 120 rubies for around $1,000 via auction after India’s stock market collapsed in 2024. Same cushion cut between 8, 9, 10 & 11 carat weights. Bulk pricing discounts.
Especially when opportunities present selves take what is offered.
In Ruby not often we find natural we all want natural but reality limits options.
Big rocks bring big buyers. Doubt. They will want how much they buy the rock for to be public. I was happy with only paying $20,000 for 10,000 gems across multiple venue auctions to attain my inventory.
Obtaining mostly purple either Sapphire or spinel but very pretty.
Actual price depends on bidders war.
If two bidders are the only bidders do not expect high sales.
I was only bidder in most auctions I won. Not typical. Not so lucky now. When markets collapse people sell what ever they can for as much as they can. Most just need enough to get home. Many sellers I bought inventory from needed funds to get home. I helped all whom sent me offers given.
Not all was real 30% glass, 35% natural, 35% treated.
Open market options not always honest.
I reported every dishonest seller.
Paid all order I made.
My inventory amounts are not substantial. Enough to last me about 5 years.
Been making items since.
Mozambique rubies obtained had more variety of shapes, various cuts mostly all same range of quality.
I did not get AAAA grade rubies — getting AAA Ruby was my goal obtained at fair market asking prices at time market collapse.
Paid $17 each was nice. Many dealers have tried to buy mine offering me they could sell for me. No Thankyou. I pretty much wanted for buying to make dog collars. Just to piss off Beverly Hills Jeweler who sent gemologist to insult me at hobby show.
I do not sell to industry.
I buy for hobby.
If I sell I give profit if made in art supplies to veteran families. I make no profit.
Most often people get greedy want as much as potential will gain them.
Cause seller and buyer to walk away.
Let buyer talk. Let them tell you amount willing to offer. If seller speaks 1st not a good sign.
Listen to buyers never listen to sellers.
Whom holds cash decides deal.