I was at Celestial Awakenings in Vancouver, WA yesterday (one of my favorite crystals stores - they also have a Portland, OR location on Stark) chatting with the store's very helpful owners Jeff and Kim. I started to have a hot flash and asked them what they recommended for hot flashes. Jeff handed me a piece of indigo Gabbro (also called blue Gabbro and Magic Merlinite), and as soon as I held it in my receiving hand (which is my non-dominant hand), all of the rising heat drained from my body. It stopped the hot flash dead in its tracks.
It was a pretty neat trick, so I bought a piece. Every time I felt a hot flash rising for the rest of the evening, I grabbed the Babbro and BAM - hot flash thwarted.
Jeff suggested holding it in my hand while I sleep, putting it under my pillow, or placing it between the mattress and box spring. I know myself. Nothing is going to stay in my hand all night, and it probably won't stay under my pillow either. Jim offered to put two-sided carpet tape on my hand and stick the piece of Gabbro to it, but I had visions of all sorts of things I would wake up with it stuck to my hand in the morning, such as my dog Monkey. Instead, I put the Gabbro between the mattress and box springs. I typically wake several times during the night to throw off covers (hot flash) and then again to put covers back on when the hot flash becomes a not flash. It only happened once last night.
Now for the geology geek bit: indigo Gabbro hasn't been mined for long (a few years). It comes from Madagascar, and it is an igneous rock with a chemical makeup that's pretty much the same as basalt. There's Gabbro in the earth's crust, especially the oceanic crust. While it forms as one rock, it is made up of several crystalline minerals including chlorite, serpentine, magnetite, feldspar, muscovite, and pyroxene in a silicate (quartz) base.
Physically, along with hot flashes Gabbro may be helpful for other heat conditions in the body, including fever and inflammation. Spiritually, Gabbro is a stone of balance. It helps integrate the dark and the light inside of you, so it's a good stone for meditation and shadow work. It can help to bring balance to your life between the physical (body and mind) and the ethereal (emotions and spirit). It can also help unify and integrate other aspects of the yin and the yang (duality). It's a good stone to have if you're doing integration or balancing work of any kind in your life.
Finally, a quick reminder. If the Gabbro is working hard for you, don't forget to cleanse it. For people in the throes of intense hot flashes (or similar conditions), I recommend cleansing it daily with smoke or sound. The cleaner energy will help it help you more efficiently. If you're not using it as much, a once a week cleansing when you cleanse your other crystals should suffice.