The zodiac sign of 2033 is Rooster, and it is Aries on April 16th. It is suitable to wear oval citrine, golden quartz and amethyst ornaments
Another suggestion: In view of your advanced age, It is best to choose a larger amethyst pendant (about 3X3 and no more than 5X5) to wear. Before wearing it, take it to the most prestigious local temple to have it blessed by an eminent monk