I love my Thumbler Tumbler. It's a small investment to put into your business for a very visible difference in your jewelery. The practice of tumbling jewelry is known as "burnishing" your metal.It is perfect finishing touch for Silver,Silver fill,Gold,Gold Fill,Copper,Brass or Stainless Steel.----Correct me if a left a burnish-friendly metal out.-No plated metals or craft wire can be tumbled.
Burnishing your finished jewelry pieces makes the metal nice in hard,smooths out all rough edges and really makes it shine like casted metals.
I purchased my single barrel tumbler for $89(but I see them even cheaper now)and $30 for the Stainless Steel Mixed Shot to put inside.The "shot" is what actually smooths out the rough edges and does the burnishing.
---There are some stones that you don't want to tumble so be careful and watch the Moh's Hardness.For example;
Malachite-
http://www.etsy.com/listing/83045767/30x20mm-malachite-cabochon?ref=pr_shop Azurite-
http://www.etsy.com/listing/82920528/29x17mm-azurite-intarsia-cabochonThese are beautiful (and really cool) stones but 3.5 Mohs Hardness... so no Burnishing for them.
Now I have heard that you can't burnish Drusy Pieces,but I do. Dyed Drusy not the Titanium plated.I could see how tumbling might ruin those that are plated.I put my dyed drusy in for just 1hr verses the normal 2 hours I do with most other pieces.I will put my Cubic Zircon and Agate pieces in the tumbler for 2-4 hrs....which might be overkill,but they are tough stones and come out as shiny and unscratched as ever when tumbled.
If you use one of the burnish friendly metals I mentioned and don't tumble your jewelry...Why not?? Give it a try,you will be so glad you did.It makes a HUGE difference.