Lava Rock Island is a 10x10 island in CityVille. It can be placed from the A Hot Commodity! goal. Additional Lava Rock Islands can be purchased from the Build Menu for 471,500 Coins. Selling one is worth 235,750 Coins. It was released March 26, 2012.
It must be placed on an already existing water expansion. You will not get a free expansion from the goal. All Residences come with full population.
You must be Level 47 to start the quest that allows building the Island.
Once completed, Lava Rock Island will have housing, a business and a community building which will overall, increase population by 2,000 and allow 2,500 Population, if bought from the build menu. Or it may increase population by 3,930, through the A Hot Commodity! goal (Likely it's 3,930 and the Build has a typo). The Volcano Tours business is based on time, not the number of visitors.
A Hot Commodity! goal. Additional Lava Rock Islands can be purchased from the Build Menu for 
471,500 Coins. Selling one is worth 
Level 47 to start the quest that allows building the Island.
2,500 Population, if bought from the build menu. Or it may increase population by 3,930, through the 
