There’s an easy way to take an SG, whereas an RI requires a refractometer and fluid and some understanding of what you’re looking at in addtion to a facet with a good polish that will stand on the refradtometer table…or you have to hold the gem facet in contact while you take the reading, which is a little bit of a balancing act…buy a small gram scale. Procure a salad dressing cup or other vessel big enough to immerse the gem in, but not so big that, filled with water, it maxes out the scale. Fill the cup with water, put it on the scale and zero out (push “tare”) the scale. Lay the gem in the water on the floor of the cup. This reading gives the weight of the gem. Tie the gem with string or fishing line or suspend it on a small wire bent into some kind of cup of the smallest weight possible. Suspend it completely submerged in the water. This gives the weight of the water displaced. Use the typical SG equation to compute the SG. No complicated apparatus to suspend the gem in a beaker, etc., as in the classical method. With an SG test and a polariscope you can test for SR vs DR. Your UV test results (long wave??) can also be looked up in a chart. Perhaps this info will be enough, along with the inclusions.
Best,
royjohn