We've Joined the Darkside! Faceting laps that is...
Developed by the inventor of the Batt™ Lap, the DARKSIDE™ is a lightweight advanced composite polymer polish lap, made of specially developed material coated onto an aluminum baseplate, then machined both sides for flatness. 8" diameter, 1/2 center hole. This lap has gotten rave reviews from professional and amature gem cutters. Click here to read a thread on our forums for more information on how to use this lap
(This is our one andesine, it's 1.2 ct, 8 x 6 mm, in case anyone hasn't seen one)
Dev and I were thrilled to receive the following review about our specific gravity travel kit.
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PrettyRock.com has released a new Specific Gravity Travel Kit. This is a wonderful kit with a lot going for it.
My first impression was the high quality of the pieces and how well thought out it is. First, there is a very nice scale. It is small, to go with the theme of being light and portable. However, it also comes with a built in breeze cover and measures up to 100 carats. That is as much as any portable scale will handle. PrettyRock advertises that it is good through 50 carats. That shows their modesty and conservative attitude when it comes to advertising.
The kit comes with a small, plastic cube, the lid of which serves as the water vessel for the specific gravity readings. It is also used to store the hanging aparatus and the calibration weight. In addition, it comes with a sturdy little stand, a pair of tweezers and an electronic calculator.
Now, I like sturdy, but I was surprised at how heavy the weighing aparatus is. I had assumed that it had to be light, so as not to use up much of the scale's capacity. To test it, I weighed several large stones and even the calibration weight. Once the scale is zeroed with the weighing accessory on it, it retains its accuracy to the full 100 carats.
I was impressed. I have been using a wimpy wire for SG readings - one that causes me to use my full vocabulary. This set up is much easier to use and takes a lot of the headaches, and vocal exclamations, out of taking specific gravity readings.
Specific gravity readings are still tricky and a lot of care needs to be used. (See Specific Gravity Testing.) I wouldn't recommend using toluene in the plastic vessel. If you are interested in traveling with the kit, a small bottle of distilled water with a drop of liquid soap will both do the job and is safer.
This is a wonderfully easy kit to use, plus it is small enough to fit in your briefcase. Whether you are looking for something portable or something for your lab, I highly recommend this kit.
Sincerely,Donald Clark CSM IMGPresident
