"Little Seasons" pendants in 14K gold; "Sun," $528; "Acorn," $628; "Snowflake," $528; all by Alex Woo. alexwoo.com, 877.WOO.ICON.
Personalized key pendant on a long bead chain in sterling silver, $132 by Jane Basch Designs; janebasch.com, 310.458.8820.
Heritage Collection zodiac pendant in 18K gold with diamond accents from $3,450 (chain sold separately) by Chad Allison; chadallison.com, 877.947.7844.
Large "Calendar Key" pendant in 14K gold with diamond detail, $1,595 by Not Just Any Old Day; notjustanyoldday.com, 818.359.5948.