Rainbow Stone Divination & Litha coming up

I'm currently reading Cunningham's Encyclopedia of Crystal, Gem, & Metal Magic by Scott Cunningham.  At the end of the ninth chapter Cunningham describes "rainbow stone divination."  It really sounds like something that I'd be interested in trying.  It calls for seven stones, one for each color of the rainbow, hence the name "rainbow stone divination."  The stones should all be approximately the same size and shape and be put into a soft cloth bag when you aren't using them.  They are used pretty much like runes, in selecting a stone and deciphering it's meaning in your life.  The list he gives he says to work with if the meanings don't resonate with you.

Red: Ruby, red jasper, red agate, rhodonite, red tourmaline, garnet.
         Symbolizes anger or other destructive emotions, birth, change, sex, passion,
         endings, energy, confrontations

Pink: Pink tourmaline, rose quartz, pink calcite, rhodocrosite, kunzite.
         Symbolizes love, friendship, peace, joy, relationships, family, interchange.

Orange: Carnelian, amber, citrine, tiger's-eye.
               Symbolizes illumination, personal power, energy, growth.

Yellow: Yellow tourmaline, topaz, yellow fluorite.
              Symbolizes protection, communication, travel, movement, exchange.
              Symbolizes growth, money, grounding, health, fertility, business transactions.

Blue: Celestite, aquamarine, sodalite, blue quartz, blue tourmaline, turquoise, sapphire.
          Symbolizes peace, sleep, healing, purification, emotions, subconscious.

Purple: Sugilite, lepidolite, amethyst.
             Symbolizes spirituality, evolution, mysticism, expansion, reincarnation.

The way Cunningham described it, though, he made it sound like you just keep pulling a stone out until you get whatever feels right.  I know, or at least I hope, he didn't mean that.  I would like to someday learn how and really study runes.  I think this may be a good sort of stepping stone, no pun intended.  What do you think?

I haven't worked with any crystals, metals, or stones yet.  I will soon, but haven't yet.  The summer solstice falls on June 21st this year.  This will be my first Litha.  I am excited, but with all the STRESS going on we didn't realize it until tonight.  (Did you notice I put "stress" in bold, capitals, underlined, and in italics?  Yeah.)

Today I've been in a lot of pain, so I haven't had one of my medicines for a couple of days.  I hope that tomorrow my doctor will call it in and I don't have to wait until Tuesday or Wednesday, but that is a possibility.  Tonight I'm going to learn more about Litha while it is quiet.  I can hear the crickets outside and it makes me long for the country, the river, and the woods.