What has happened is your gear has "crashed". This is common, especially for high dosed gear. It even happens with pharm grade test from your Dr. Don't worry. There is an easy fix. What you are seeing the the raw hormone, which has separated from the oil. The more MG's you try to add to oil when creating gear, the harder it is to keep it disolved. If the gear happens to get cold, for instance, in shipping, there is a good chance that it can crash. 

The Solution :

The gear needs to be heated up. I have seen guys talk about a couple methods. Theres an easy one. Put a pot of water on the stove and bring it to a boil. Seal your vial in a zip lock bag. Place the bag in the water for about 30 seconds. Remove from water and shake vigorously for about 1-15 seconds. Repeat. Be careful not to burn yourself on the vial. Depending on how much it has crashed, this process may take up to 15 minutes. Eventually, you will see the crystals get smaller and smaller, until they are gone. 

Another option is to heat the vial with a hair drier and shake. Outcome will be the same.

From this point, the gear is ready to use again. Just be sure to let it cool before injecting!! With all gear, I would try to avoid letting it get very cold, IE, out in the garage in the midwest during winter. A cool, dark place is ideal for gear storage. Keep an eye on it and make sure that it doesn't begin crashing again. At 500mg/ml, this process may need to be repeated in the future. Also, 500mg/ml is probably going to be a VERY painful shot, so get ready for that.