In Exodus 28:17, this signifies the celestial love of good. (Arcana Coelestia 9862) 'Lazuli, agate, and amethyst' denote the spiritual love of good. 'Beryl, onyx, and jasper' denote spiritual love of truth and 'sardine' signifies divine truth. 'Ruby, topaz, and carbuncle' signify the celestial love of good because of their red, flaming color. 'A covering of precious stones,' as in Ezekiel 28:13, signifies the truths of intelligence. 'Precious stones,' in application to the Word, symbolize the Divine truth of the Word in its literal sense which the Divine truth in its spiritual sense shines through. 'Chrysoprasus, sapphire, and diamond' denote celestial love of truth. 'Emerald' signifies the sphere of divine love and wisdom.

(References: Apocalypse Revealed 911)

Like "say," the word "speak" refers to thoughts and feelings moving from our more internal spiritual levels to our more external ones -- and ultimately from the Lord, who is in a sense the most internal spiritual level of all. This is generally called "influx" and "perception" in the Writings, meaning they are thoughts and feelings that flow in in a complete way from the Lord, rather than being things we have to think about and figure out. On a number of occasions "speak" and "say" are used together; in these cases "speak" refers more to intellectual instruction in matters of thought and "say" refers more to feelings and affections that flow in directly.