Bring the water to the boil but do not allow it to boil vigorously-maintain a gentle boil for one minute exactly. Remove the saucepan from the heat and allow the eggs to cool slowly in the water(this can take up to an hour). When the water is cool, remove the eggs, peel and slice in half.
See figure 2 for an example of a Baird Mint rhodium bar. The spot price of rhodium (November 2014) is at $1170.00 per Troy ounce. The 1/10 ounce bars sell for around $210.00 to $230.00. This is a much larger premium over the melt value when compared gold or platinum. The premium on the one ounce bar is around $200.00 to $250.00.
At $700/kg, this product, sold under the trademarked name Rhovanil Natural, is not cost-competitive with petrochemical vanillin, which sells for around $15/kg. However, unlike vanillin synthesized from lignin or guaiacol, it can be labeled as a natural flavoring.t $700/kg, this product, sold under the trademarked name Rhovanil Natural, is not cost-competitive with petrochemical vanillin, which sells for around $15/kg. However, unlike vanillin synthesized from lignin or guaiacol, it can be labeled as a natural flavoring.