רָאמ֣וֹת וְ֭גָבִישׁ לֹ֣א יִזָּכֵ֑ר וּמֶ֥שֶׁךְ חָ֝כְמָ֗ה מִפְּנִינִֽים׃
No mention shall be made of coral or of crystal; Yea, the price of wisdom is above rubies.
Read kabbalistic (mystical) interpretation of Job 28:18: and classical mystical sources.