As you could see from the picture earlier mentioned, you will find 3 main areas. The wire leads connect with two silvered plates on possibly side on the quartz slice which form a capacitor. Last but not least, the quartz alone will behave like an inductor (a big just one) https://esocialmall.com/story4345853/the-smart-trick-of-bulk-crystal-oscillator-that-no-one-is-discussing