Tartaric Acid Crystals I intended to make these right after making the sodium ammonium tartrate crystals, but they kept turning into polycrystals. It actually took quite a bit of effort to grow a single crystal.

I posted a video last year of myself making crystals with this kit (though the video is in Japanese). m.youtube.com/watch?v=nWdA...

In Japanese discount stores, you can find crystal-growing kits like this for just 330 yen (about 2 dollars). They keep the cost down by including only the chemicals and the instruction manual. With this single kit, you can do five different experiments!

These are crystals of ammonium sodium tartrate (the left is the L-form, and the right is the D-form). The D- and L-form tartrate ions are mirror images of each other, and this relationship is preserved all the way through to the crystal structure.