Starbraries are recognized by the presence of glyph-like markings, symbols and geometric patterns plus usually a doorway or key. By aligning fingers with the doorways or keys, you can unlock different layers, depending on orientation. Companion crystals are important - they either come with the crystal (purchased with or given with) or appear shortly thereafter. They don't have to be quartz, but work with the main crystal to unlock different layers or even gain access to the crystal itself. All Starbraries work like that - the companions facilitate access, although it's possible to gain access just from the Starbrary itself.
There are at least 6 different peoples who left crystal records. The most sought after are the maps, histories and legends of the people of the Cassiopeia system. They are recognized by more flowing lines and symbols along the sides of the crystal. While they often manifest key markings, they don't always, but there will always be different and comfortable ways to hold the crystal, facilitating the opening of the many layers. These are the most detailed crystals and contain HUGE amounts of information - like encyclopedias, although even more in depth.
Another type features geometric symbols (triangles, squares, circles, etc.) along the sides, often with profound keys. These contain information from the Pleiades. These first two types are the most important and are the basis for most of the Atlantean and Lemurian recollections.
A different Starbrary shows more linear patterns, rather like a combination of the first two. The peoples leaving these records came from the Leo systems and the information contained within these crystals is more historical information: names, dates, weather, etc. They contain much factual information and not as philosophical as the first two.
Another type is a series of indented triangles and dashes - a kind of Morse code. These are often called "cosmic crystals" and they resemble a meteor shower. They are read by the "dots" and dashes and arise from a system in the Little Dipper (Ursus Minor).
The Titanium included quartz with the deep ridges and furrows that create definite glyphs in the faces of the crystal is the only Starbrary that is marked in the faces rather than the sides. These arose from the Orion system, and of all, these need companion crystals. The information contained in them is very, very detailed and the companions help make it both attainable and understandable. These crystals were of great importance to the Native American cultures.
The last is a slightly different type in that they are almost always DT/ET. They have keys, but these keys are sometimes quite tiny. The critical thing about these is the sides appear to be layered, similar to a Lightbrary, but with no raised face/termination. It's as if the ET crystals overgrew the main one. These come from Andromeda peoples and these appear to be connected to crystals of the Cassiopeia or Pleiades peoples. They often appear as companions leading to speculation that there may have been collaboration among the peoples.
All of the Starbrary formations hold information of peoples who had a positive influence on human growth and evolution. The records were left here so that in the event of catastrophe, there would be a permanent record to help Earth rebuild. Starbraries were placed in many locations so the records could be accessed by peoples all over the world. There are sets of crystals - like chapters or series. When one comes to you, all of a sudden, you will find many more. It is important to ask the order to read them.
The above was channeled through Mirahh, Master Starbrary, to me in August, 2003. This material is copyrighted. You may use it with permission with appropriate credit.