If all the gold ever mined could be brought together and melted into a cube, it would measure 60 feet by 60 feet - a small enough cube it would fit under the Eiffel tower. If all the platinum that has ever been mined could be brought together and melted into a cube, it would fit in a two car garage. Most platinum is microscopic particles that are extracted from ore. Platinum nuggets are extremely rare and platinum is the heaviest of the precious metals and very dense. I have a small collection that I was able to acquire from Choco, Columbia.
Weight: 0.64 grams (3.2 carat)
Dimensions: 1/4" or 7mm