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Because pumice is lighter than obsidian always. That means obsidian weighs more than pumice.

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10y ago

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What is the density of a piece of obsidian that has a mass of 239.2 g and volume of 92cm?

Yes, obsidian is dense. It is, therefore, heavy (compared to Pumice, which can float).


Why a piece of expanded polystyrene feels much lighter the an equal volume of lead?

the answer is i dont no the answer is i dont no


What is the smallest piece of volcanic stone called?

pumice


Is obsidian found anywhere in upstate new york?

My 8 year old found a large piece of obsidian in dansville ny this weekend. We are amazed by its size and beauty


What texture of obsidian?

Obsidian is an extrusive rock that cooled very rapidly without forming crystals. As a result, obsidian has a smooth, shiny texture of a thick piece of glass.


Is there any unusual thing about pumice?

Try putting a piece in a glass of water and see what happens...


How do you burn the eges of a piece of paper?

with a lighter


How much is obsidian worth?

Low quality or common obsidian can be purchased wholesale for as little as 50 cents a pound. Retail costs are slightly higher and the price can rise considerably when purchasing rare colors such as red, green and blue. Also, large pieces are worth more, and price is also affected by the amount of impurities found in the piece. A football piece of good quality obsidian can sell for around $75.00.


How does the obsidian sun viewer work to safely observe the sun?

The obsidian sun viewer works by using a specially designed piece of obsidian to filter out harmful rays from the sun, allowing only safe levels of light to pass through for observation. This protects the eyes from damage while still providing a clear view of the sun.


What is the density of a 49.8g piece of pumice that has a volume of 83cm3?

density = mass/volume 49.8/83 =0.6 g per cm3


Why not is a piece of glass a mineral?

Glass doesn't have a crystalline structure, or a specific chemical composition, so it is not a mineral. Obsidian is not a mineral for the same reason.


How do you make an arrowhead?

To make an arrowhead, first get obsidian. (caution, obsidian is very poisinois, call 911 if you get it in you) then, get a big piece of quartz. Start rubbing them together. Every once in a while, change the position of the obsidian. After a while, the bottom will be a sharp point. Then, near the top, take a small piece of courtz and rub it on both sides to make it symmetrical.