I have a turquiose ring, round stamped with what I believe to be HH. The first H is very clear although the second letter almost looks like a mistrike H, could be a worn F, E, etc... what do the letters mean??? There are no purity markings that I can see.

The HH is stamped on what? Is the turquoise set in silver to make the ring? Is the HH stamped into the silver?

Or is the turquoise itself carved into a ring (no silver or other metal involved) and the HH carved into the stone?

HH is stamped on the underneath on the inside of the ring on the silver. Stone is set in middle of the setting as a single stone.

To determine the meaning of the stamp on your turquoise ring, you can follow a few steps:

1. Research Jewelry Hallmarks: Jewelry hallmarks are symbols or letters stamped on jewelry to indicate various information, such as the manufacturer, metal purity, and sometimes the location. Start by looking for online resources or jewelry hallmark databases that can provide you with information about different stampings.

2. Identify the Stamp: Based on the information you provided, the stamp on your ring appears to be "HH." However, the second letter is unclear. It's important to examine the stamp closely in good lighting and perhaps with a magnifying glass to determine the exact letter or symbol that has been stamped.

3. Consult Jewelry Experts: If your research doesn't yield any results, consider reaching out to jewelry experts or professionals. You can visit a local jeweler or contact antique jewelry appraisers who specialize in identifying and evaluating various types of jewelry markings. They may be able to provide you with insights about the stamp on your ring.

4. Consider the Context: While researching, consider other factors that might help you decipher the stamp's meaning. For example, if your ring has other markings, such as symbols or numbers, these could provide additional clues. Antique or vintage jewelry might have different hallmarks compared to modern pieces, so keep the age of your ring in mind during your investigation.

Remember that identifying jewelry hallmarks can sometimes be challenging, especially if they are not well-known or documented. Consulting with professionals who have expertise in jewelry history and markings will likely provide the most accurate information.