? Pink Diamond

Do you see that pink gemstone in the center of that ring? I believe that may just be a pink diamond. I bought it in a parcel, and it is about a 5mm round. I set it in the ring setting, after using the dichroscope on it. It appears to be a single refractive gemstone. There are only three natural gems that are single refractive spinel, garnet, and diamonds. Glass, and synthetics are as well, but this gemstone has inclusions and glass and synthetics do not usually have these kind of visible inclusions. If it is garnet I have never seen one this color. That leaves diamond, or spinel. No matter which it turns out to be, I love it, and I wear it as an alternate to my engagement ring.