Came here after watching measuring SG of silver and gold coins. Coin guys use a square tank and a BASKET suspended into the water. The basket is easier to use than the string. Would be nice to see an experiment that shows how much results change if you drop the rock lower (more wet string). Rig a suspension over the cup to make it more stable, and don't dangle it from your wavy hand. Great video.
@@paranorml1 Yes, I think you should, the reason being is the formula for specific gravity that I learned was dry weight divided by the difference between the dry and wet weight. Unless, of course, my geology prof was wrong. But I liked your video presentation.
Thanks for the share! I am just learning about SG and have filled my head with a lot today! Your video helped put it all into perspective. A few years ago I purchased several hundred gemstones from someone who was buying jewelry just for the gold. I stopped in one day and for $100 he sold me all of the stones (only a small handful of very small diamonds). You would be AMAZED to know all of the gemstones I’ve found (I went back one more time before he went out of business) some worth over $10,000! A 3mm purple, color changing, oval sapphire! Now, it’s time to test them I’m a silversmith and truly enjoy making jewelry but some of these gemstones are just too special for my style of jewelry. I’m grateful for your video and the knowledge that you’ve shared with me. It will definitely help me in determining if my $200.00 (total of two trips) investment in these stones is going to be a FABULOUS investment!!!!
I have several other videos showing me, my twin brother and friends collecting gemstones, crystals, and panning for gold. You should start making videos of your silver work on your channel!
Yes, you can use a kitchen scale. But remember that the more accurate the scale the better. It is very difficult to be accurate with a small stone, unless you have a very accurate scale.
@@paranorml1 thanks for answering, I was weighing a celestite on the kitchen scale and it came out 12 ?grams, then weighed in water and got a 3-4. Does not seem accurate.
@@paranorml1 I am suspending the stone in water supported on a wire, and I guess that's okay since it does not touch the sides or bottom of the water container.
Would you please answer a question? It seems nowadays specific gravity is being found by dividing air weight by water weight. Another formula is to subtract water weight from air weight and then divide. Which is most correct? Thank you.
I'm not sure about any other home methods. To get a full scientific Specific Gravity requires special equipment and complex math equations. But the way I do it in the video is the easiest way I know of. Simple with simple equipment......
the only bummer is I had to watch you weigh 2 dozen rocks to finally get to the point which is the division of the dry weight by the water displacement weight.
![How do you KNOW what a gem is? [Refractometer Tutorial]](/img/1.gif)
Came here after watching measuring SG of silver and gold coins. Coin guys use a square tank and a BASKET suspended into the water. The basket is easier to use than the string. Would be nice to see an experiment that shows how much results change if you drop the rock lower (more wet string). Rig a suspension over the cup to make it more stable, and don't dangle it from your wavy hand. Great video.
Thank you for this nice video. It's very direct and informational and straight to the point without a bunch of nonsense first.
Thank you sir. I am probably going to remake this video in the future.
@@paranorml1 Yes, I think you should, the reason being is the formula for specific gravity that I learned was dry weight divided by the difference between the dry and wet weight. Unless, of course, my geology prof was wrong. But I liked your video presentation.
I tried exactly what u did. Thanks for sharing. God bless you brother. Wish you gud luck
Thanks for the share! I am just learning about SG and have filled my head with a lot today! Your video helped put it all into perspective. A few years ago I purchased several hundred gemstones from someone who was buying jewelry just for the gold. I stopped in one day and for $100 he sold me all of the stones (only a small handful of very small diamonds). You would be AMAZED to know all of the gemstones I’ve found (I went back one more time before he went out of business) some worth over $10,000! A 3mm purple, color changing, oval sapphire! Now, it’s time to test them I’m a silversmith and truly enjoy making jewelry but some of these gemstones are just too special for my style of jewelry. I’m grateful for your video and the knowledge that you’ve shared with me. It will definitely help me in determining if my $200.00 (total of two trips) investment in these stones is going to be a FABULOUS investment!!!!
Glad you enjoyed the video, and glad that you enjoy making jewelry! I can be a fun hobby and even make you some money.
I have several other videos showing me, my twin brother and friends collecting gemstones, crystals, and panning for gold. You should start making videos of your silver work on your channel!
Great information I appreciate it thank brother it's veer helpful
Verry nice..I take more knowledge wach after this video.. thank you
Very easy and interesting method for knowledge.
Thanks
You forgot to weigh the string as well, is why most are off by just a touch.
Question. Can I use a kitchen scale for this?
Yes, you can use a kitchen scale. But remember that the more accurate the scale the better. It is very difficult to be accurate with a small stone, unless you have a very accurate scale.
@@paranorml1 thanks for answering, I was weighing a celestite on the kitchen scale and it came out 12 ?grams, then weighed in water and got a 3-4. Does not seem accurate.
@@patriciagonzalez9341 , that is indeed accurate. Specific Gravity of Celestite is about ( 3.96 ).
Here is the Wikipedia information for Celestite. (specific gravity is shown in the right side collum) ... en.wikipedia.org/wiki/Celestine_(mineral)
@@paranorml1 I am suspending the stone in water supported on a wire, and I guess that's okay since it does not touch the sides or bottom of the water container.
Would you please answer a question? It seems nowadays specific gravity is being found by dividing air weight by water weight. Another formula is to subtract water weight from air weight and then divide. Which is most correct? Thank you.
I'm not sure about any other home methods. To get a full scientific Specific Gravity requires special equipment and complex math equations. But the way I do it in the video is the easiest way I know of. Simple with simple equipment......
In my video we are using the "basic calculation" .... ..... en.wikipedia.org/wiki/Relative_density
@@paranorml1 the way you do it seems simpler, thanks.
are you weighing carats or grams
grams ( in 1/100th gram accuracy)
the only bummer is I had to watch you weigh 2 dozen rocks to finally get to the point which is the division of the dry weight by the water displacement weight.
As already stated, the calculation is incorrect. The difference is used divided into the weight in air, not the weight in water.
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