If you're looking for crystals that will help you grow and change quickly, I recommend specific cuts (called Vogel crystals) developed by IBM research scientist Marcel Vogel. He held multiple patents for IBM and specialized in magnetics and liquid crystal systems.
Vogel's earliest research in the 1950s was dedicated to the energy interactions between humans and plants, measuring how plants responded to his own thoughts about them. From those studies, he reached the conclusion plants stored and responded to the energy of human thought, which led him to the realization the energy the plants most favorably responded to was love.
In the 1970s, Vogel began researching the energy of crystals cut in specific shapes and how the vibrations of those crystals could affect the vibration of the subtle body (energy system of living beings). In his research, he also studied how crystals affected water, noting the water behaved differently in their presence.
After retiring from IBM in the 1980s, Vogel formed his own lab, Psychic Research, Inc., where he dedicated his time to studying energy anatomy and crystals. His work focused on quartz crystals - primarily clear quartz - and he discovered how certain sacred geometric shapes and cuts affected the crystals' energy more strongly. He also did research demonstrating that when liquid crystals were cooling and solidifying, focus and thoughts could affect the shape of the crystal's lattice structure.
Vogel further explained that crystals, which grow from a single seed cell, contain all of the information necessary to continue crystal growth. When the crystal is fully formed, the intelligence matrix it contains from the original seed cell goes dormant and remains so until human interaction and intent reignites the intelligence of that matrix. Then, it interacts with subtle vibratory fields associated with living beings - in other words, with your energy anatomy. Likewise, science shows crystals can store information that can be retrieved and reactivated. So, Vogel viewed the crystal matrix as a way to store, retrieve, and transfer the energy of intent, thought, and creation.
During his research, Vogel start to experiment with faceting quartz and other crystals in specific, mathematically precise designs that reflected the mathematics and proportions of sacred geometry. He discovered that with precise faceting of the crystals, they developed powerful intentional energies that could affect the vibrational energy of living beings. He developed designs based on the Tree of Life (as in the wand above), the Star of David, and other shapes.
Vogel's faceting of crystals was highly precise and after his death, only a few (three) of his students continue the work in the manner Vogel prescribed. Each crystal must be cut on a certain axis (the C axis) with specific angles for each of the facets and tips. Very few people carry on his legacy of crystal cutting. Vogel crystals are hand-cut from natural quartz and some of its derivatives (such as citrine or smoky quartz) according to precise measurements, and they have a very powerful energy.
You will find wands cut according to Vogel's precise specifications are powerful tools. They are not inexpensive, and there are many faceted wands that are called Vogel style but lack the precision necessary to be a Vogel wand as there are three people in the world cutting them. Three places that sell authentic Vogel crystals include Luminary Studios, VogelCrystals.net, and Crystal Wings.
Properly cut Vogel wands have intense energy that can help focus healing energy. The number of facets (ranging from six to 38) determines the type of energy the cut brings, amplifies, and works with.
Tools for Evolution jewelry is also designed based on the principles developed by Marcel Vogel. These powerful tools have been transformational in my experience, and for many others, as well. The jewelry manufacturer uses the precise cuts, but with a number of crystals besides quartz, and they also have a powerful and sacred energy that can bring about change and transformation quickly.
I have worked with both the Vogel wand and the Tools for Evolution. They provide tremendous clarity and are highly transformative. I wear my Tools all the time, and I work with my wand in meditation and healing. To be honest, I almost don't want to put the wand down it is so powerful.
I believe Vogel crystals (and Tools for Evolution), like all crystals, choose you. Each is created for a specific individual, and the information about to whom they are to eventually come is stored inside of them. They come into your life when you need them, and they are there for as long as they can serve your growth and evolution. If you feel drawn to them, it may be that is because there is a Vogel crystal with your energy stored in it, just waiting for you to come along so it can choose you.