Rubrum Handcrafted Jewelry Address: 928 S Western Avenue, Los Angeles, CA 90006Phone: (213) 458-4279 (1 votes, average: 2.00 out of 5)Loading... Rubrum is handcrafted jewelry by Jennie Kim. She uses gemstones, pearls and silver. The boutique shop is located on the third level of Koreatown Plaza. Since 2011. Gem Tech JewelryVendome Jewelry Posted in SHOPPING and tagged jewelry, Korean, Koreatown Plaza.