Matthew Poole and continuators on Revelation 21:20

20 The fifth, a sardonyx; the sixth, a sardius; the seventh, a chrysolite; the eighth, a berill; the ninth, a topaz; the tenth, a chrysoprasus; the eleventh, a jacinth; the twelfth, an amethyst .

I cannot tell what to make of these precious Stones, with which they are said to be garnished, unless it be their Spiritual gifts and habits of Grace. The various manifestations of the Holy Spirit given to the Apostles to profit the Church with all, with which they adorned the Doctrine of the Gospel, and wan upon the Pagan World, making themselves admirable in the Eyes of Men and Women. Nor were it hard to descant upon these several sorts of Stones, and to shew of what Graces they may be Types; the Iasper, of Steadiness and Constancy: The Saphyr, of Heavenly-mindedness; (it being a Stone of the colour of the Heavens:) The Chalcedony, of Zeal: the Emerald, of Vigour and Liveliness: The Sardonix (a stone of various colours) of various gifts and graces: The Sardius, of Courage and Fortitude, and a readiness to shed their Blood for Christ: The Chrysolite, of Love, or Wisdom, and Knowledge: The Berill, of a quickness of sight and understanding; The Topaz of searching out Divine Mysteries: The Chrysophrasus, of Gravity and Severity: The Iacinth, of Spiritual Ioy, Calmness, and Serenity of Mind: The Amethist, of Sobriety and Temperance: But it seems to me too great curiosity to Philosophize so far upon the nature of these Stones; take them together, they probably signify all the Gifts and Graces of the Blessed Apostles, by which the Religion of the Gospel was first commended, and made to appear lovely to the World.