The value of medieval ruby and silver rings depends on many factors. These factors include the quality, color, weight, transparency and cutting of ruby. In addition, the manufacturing process and design of the silver-inlaid ring will also affect its value.

Ruby is a very rare and precious gem. The higher its quality, the greater its value. The color of ruby is an important factor to determine its value. The fuller and brighter the red color, the higher the value. Transparency and cutting will also affect the value of rubies. The weight of rubies is measured in carats. The greater the weight, the greater the value.

In addition to the quality of ruby itself, the manufacturing process and design of silver-inlaid ring will also affect its value. High-quality technology and unique design will make the silver-inlaid ring more collectible.

To sum up, the medieval ruby-inlaid silver ring may have some value if it has high-quality ruby, excellent manufacturing technology and unique design. However, in order to accurately evaluate its value, it is best to consult a jewelry appraiser or a professional jeweler for professional evaluation and valuation.