For example sugar gum weighs approximately 1070kg, while a cubic metre of pine weighs only about 512kg. River red gum is approximately 915 kg/m3. The figures quoted are air-dry density.

The most commonly referenced “heaviest wood”, lignum vitae (Guaiacum officinale), has a specific gravity of 1.05 when green, which makes its weight about 1365 kg/m3, or 85 pounds per green cubic foot….Hardwoods.

For instance Red Oak is about 45 pounds per cubic foot, (or 730 kilograms per cubic meter), which in and of itself isn’t too terribly useful, seeing as how you will most likely never encounter (or be required to lift) a piece of oak that is a perfect one-foot (or one-meter) cube.

A solid cubic metre corresponds with one cubic metre from 1 metre long logs of wood. These are placed on top of each other without gaps in 1 m width and 1 m height. A solid wood cube results. A stacked cubic metre also corresponds with one cubic metre.

Balsa

Black Iron Wood

The answer depends on the type of wood and determines whether that wood would float or sink. This ratio between weight and volume is called density. An object that is less dense than water can be held up by water, and so it floats. It still will float, but some of the wood is submerged into the water.

Generally acknowledged as the hardest wood, lignum vitae (Guaiacum sanctum and Guaiacum officinale) measures in at 4,500 pounds-force (lbf) on the Janka scale. That’s more than twice as hard as Osage orange (one of the hardest domestic woods) at 2,040 lbf and more than three times harder than red oak at 1,290 lbf.

A feather floats in water because it’s density is less than that of the water . Hope that this will answer your question. because it’s density is less than that of the water . this is because it has less density than water i.e. less than 1g/cm3.

Pumice stone

It’s true — some rocks can float on water for years at a time. And now scientists know how they do it, and what causes them to eventually sink. In this 2006 satellite image, a large “raft” of floating pumice stones (beige) appears following a volcanic eruption in the Tonga Islands.

pumice stone

Uses of Pumice

• an abrasive in conditioning “stone washed” denim.
• an abrasive in bar and liquid soaps such as “Lava Soap”
• an abrasive in pencil erasers.
• an abrasive in skin exfoliating products.
• a fine abrasive used for polishing.
• a traction material on snow-covered roads.
• a traction enhancer in tire rubber.