Kruggerrand Demand Pushes Output of Gold Coins to 23-year High
Understanding assays and exploration results can get confusing when everyone, it seems, are using different units of measurement. The purpose of this write-up is to explain in simple, concise terms, the difference between a troy ounce (oz), gram (g), Mo and MoS2.
Precious metals such as gold and silver are typically sold by the troy ounce. Many people don’t realize that an ounce of gold (and other precious metals) is measured using a different weighing system called "troy weights".
A troy ounce is more than the standard ounce found at the grocery store. Here in North America we often use the avoirdupois (standard) ounce for everyday weighing. Every time you step on the scale at home, or weigh food found in the grocery, you use the avoirdupois ounce weight system. 1 avoirdupois ounce = 28.35 grams.
1 troy ounce = 31.1034768 grams (31.1 rounded).
St. Elias announced on Feb 17, 09 an average grade of 0.94 oz/t over 217 tons from the Tesoro. This equates to 29.24 g/t using the troy ounce conversion factor above. St. Elias also announced a grade of 1.66 oz/t assayed using grab samples from the Beaverdell Property. 1.66 oz/t multiplied by 31.1034768 = 51.63 g/t.
Molybdenum
To convert from Mo to MoS2 – Multiply by 1.6681
In a news release dated August 28, 2009, St. Elias announced preliminary resource estimates from the Carmi Property in British Columbia. The results were stated in Mo. These numbers can be converted to MoS2 using the preceding formula. See the calculations below made using the numbers from the August 28-09 news release.
| Classification | Tonnes | Mo (%) | MoS2 (%) |
| Indicated | 12,906,000 | 0.058 | 0.097 |
| Inferred | 27,385,000 | 0.056 | 0.093 |
The Financial Post reports in a Bloomberg dispatch Friday that Barrick Gold chairman Peter Munk said an "unpleasant and frightening" trend may help push gold over $1,000 an ounce.