Choose your answer from: (I) Decide how the stone will stand out among other similar gemstones. Selection from an unconventional choice such as turquoise works perfectly well.; (II) Opal stones come in a variety of colors, shapes, and textures. It is important that you decide on a ruby or sapphire for your opal, as these gemstones are far more valuable at low price than others.; (III) Since buying an opal can be a significant investment, learn as much as you can about them before you start shopping. This will ensure you make an informed decision and get what you pay for.; (IV) Consider buying opal jewelry before buying a diamond, as a diamond is a very valuable gemstone. Opals are typically identified as a " ruby.;Choose from options above and answer: What most naturally follows?

How to buy an opal
Familiarize yourself with opals and their terminology.
Opals differ from other precious gemstones in their basic composition and how they are valued. These unique stones come in a wide range of colors and patterns, both of which can change, depending on the angle you view them from.
Answer:
(III)