There are several crystals that are believed to encourage abundance and success. Here are some of the most popular ones:

1. Citrine: Known as the "stone of abundance", citrine is believed to attract wealth and prosperity. It is also said to enhance personal power and confidence.

2. Pyrite: Pyrite is often called "fool's gold" because of its metallic sheen and resemblance to gold. It is believed to help manifest wealth and prosperity, as well as boost creativity and confidence.

3. Green Aventurine: This crystal is said to bring luck and abundance to those who wear or carry it. It is also believed to be good for attracting money and opportunities.

4. Clear Quartz: Clear Quartz is a powerful crystal that can be used for many purposes, including attracting abundance and success. It is said to amplify the energy of other crystals and can be used to charge them with energy.

5. Amethyst: This crystal is often associated with spiritual growth and intuition, but it is also believed to attract success and abundance. It is said to help clarify goals and promote motivation.