Specific Gravity test for mineral identification.

Nice video, I believe the paper clip (mark it how far for when weighing with stone) should of been tared out with the water and container

Very awesome Video about specific gravity test for gem and mineral like rough raw diamonds. Very very useful and accurate Method. Yes! Simply but efficient and effective. Thank you very much for helping us how to do demonstration home test.❤❤❤❤❤❤❤❤❤❤❤🎉

Very helpful! thank you so much! Right to the point. I hate when people draw things out in the beginning and I have to skip around to find the pertinent information scattered within all the nonsense. No nonsense here! Thank you! :)

Nice and easy way of making people understand. good job.

Very helpful. Thanks for taking the time to make this video.

Thank you sir! It's so clearly to understand 👏

Simple, clear and effective demo

You did not tare the paper clip and that is big error, you should tare scale with the paper clip this would give you more acurate result

Very nice, thanks for posting.

I used this exact method to test for the specific gravity of my cat!

You're eyes are so contagious

Thank you that was beyond helpful!

Your video is very clear and  easy to follow  and the test itself is interesting ;  using Archimedes Law( I think) to tell whether it is Topaz or Quartz.  I enjoyed this.  

Try using braided fishing line rather than the paper clip. The lower displaced volume of the line will result in less calculated error, and will get you a more accurate S. G.

U bery smot man. Tanku

I would only say that it is necessary to suspend the paper clip in the container of water before zero'ing the scale for more accuracy. Otherwise, you're including the weight of the paper clip in the weight of the second measurement when it shouldn't be. For heavier minerals, it shouldn't affect the results too greatly doing it this way, but for far lighter minerals, the outcome will differ quite a bit

Thanks for the video it was helpful

Its very awful thank you for sharing your thoughts efficient ideas in identifying rough Minerals.🎉🎉🎉❤❤❤

Here's the explanation of the physics behind this test as I understand it. The specific gravity by definition is the ratio between the weight of an object and the weight of the water of the same volume as the object. The weight of the object we measure directly using the scale. Now all is left to prove is that when we suspend the object in the water, we are in fact measuring the weight of the water of the same volume as the object. When the object is suspended in water, the following forces act on it. There is a gravity force acting in the down direction (let's call it G_obj). There is buoyancy force acting in the up direction (much like it would for a ship at sea) - let's call it B. And there is the tension force of the cable holding the object - let's call it T. Since the object stays in place these forces balance. Therefore T = G_obj - B. What the scale measures, is the gravity force (expressed as weight) acting on the entire setup minus the tension force T. That's because we are essentially supporting part of the setup and the rest is supported by the scale. The gravity force for the entire setup is G_obj + G_watercup. So the scale will measure G_obj + G_watercup - T = G_obj + G_watercup - (G_obj - B) = G_watercup + B. But we actually use scale's tare to subtract G_watercup. So we get a reading of exactly B. But the buoyancy force is actually equal to the weight of the displaced water - which is what we wanted. The important thing to consider for this experiment is to use reasonably pure water. Impure water will have a different density which will result in a different buoyancy force. Similarly, it's important for the water not to contain air bubbles as this will make it less dense, again affecting buoyancy.

Hello.thank you for sharing this clip .i have a question , dose this method work for a small rough or gem? .i mean around one or 2 carats ?thanks