PT950D200ct means that the ring is made of 95% platinum, which is also commonly known as platinum. The ring is inlaid with a diamond weighing 200 carats. Platinum is a precious metal, which is usually used to make high-grade jewelry. Diamond is a precious gem, which is usually used to make high-grade jewelry. So the value of this ring is very high.

However, it is impossible to determine the authenticity of the ring, because professional jewelry appraisers are needed for identification. If the logo on the ring does not match the actual composition, or the diamond on the ring is not a real diamond, then the ring may be fake.

Besides, even if this ring is real, it is not necessarily valuable. Because the value of a diamond depends not only on its weight, but also on its color, clarity, cut and other factors. Therefore, in order to determine the value of this ring, a professional jewelry appraiser is needed to evaluate it.