CLASSICAL APPEAL: Ideas for the classical appeal theme could be Roman/Greek Pillars or Michelangelo's David. In terms of applying such, perhaps the T in Stone could represent a Pillar and Michelangelo's David might be perched around the S in Stone. Another idea for the pillars might be having "Stone Solid" resting on top of a strong pillar. The development of David (say three blocks highlighting the transformation also comes to mind. The idea of rock walls and steps (going up/coming down or both) is intriguing. Also, I'm open to a chiseled connotation in the name STONE, any of the previously mentioned ideas, or something completely different altogether.
MODERN APPEAL: Although it is early 20th century, Rodin's "The Thinker" comes to mind. Other ideas include a rock wall, column, or mountain with an individual in a "Shawshank Redemption" pose on top or one person giving a hand to another helping them up a wall, mountain, or column.
COLORS: I'm leaning towards a red, grey, and black color scheme. I've looked at colorcombos.com and gravitated to red cc000, black 0000, and grey cccccc. That said, I am open to variations of that color scheme.
FONT: I like Copperplate and I used it on a rough draft (in the attachment).
PLEASE FEEL FREE TO BE CREATIVE. I'M ONLY OFFERING IDEAS. I COULD VERY WELL OBSERVE A LOGO THAT CAPTURES THE CULTURE AND ESSENCE OF MY PRACTICE MORE ACCURATELY.