Most current testing of lime quality involves discovering the neutralising value of the lime based on method P33, which uses hydrochloric acid to react with the Calcium Carbonate neutralising the acid. The more acid that can be neutralised by a determined sample of the lime product the higher the Calcium carbonate content of the lime. Fortunately your soil is nowhere near the acidity of Hydrochloric acid. If it was then you would need a lot of lime in order to grow anything.
Another lesser known test is the Hars/Resin test, which uses an acid with a pH value close to the average pH value of soil to give you a more accurate indication of how much of the product is going to be readily available and how much is going to need a good amount of time for the soil to slowly break it down. Much like the ocean breaks away at the limestone cliffs of our coastline except without the pounding action of millions of tones of seawater everyday.