13 But Allah will admit those who have iman and do right actions into Gardens with rivers flowing under them where they will be adorned with gold bracelets and pearls, and where their clothing will be of silk. (Surat al-Hajj: 23) [Jannah: The Garden from the Qur'an and Hadith ]

Every detail in the description of the Garden speaks to every period
of time and appeals to everyone. Rubies, emeralds, pearls and other
precious stones are rare and valuable and everyone appreciates them.
For this reason, that the mansions are made of these stones is an
important indication of their priceless value.
Among these stones, the reddish transparent rubyis the rarest precious
stone in the world. The shiny, smooth, round pearl has an
extraordinary aesthetic beauty. Its formation is very special. Over
time, alittle grain of sand insidean oyster irritates the soft inward
of the oysterwhich covers it with calcium carbonate until it
eventually becomes a thing of striking beauty. Of course, these
descriptions and comparisons with regard to the Garden areexamples
taken from theconditions pertaining in this world. These comparisons
are necessary as a means to broaden our horizons and for us to think
aboutthe Garden. But the beautiful things of the Garden will be much
more magnificent than the jewels of this world.
... who will inherit Firdaws, remaining in it timelessly, for ever.
(Surat al-Muminun: 11)
Everything in the Gardenhas been created to be as pleasant as
possible. The Prophet says the following about the mansions in the
Garden:
In the garden there isa tent of pearls, whose width is sixty miles, in
each corner of which the believer will have a wife whom the others
will not see. (Sahih al-Bukhari)
Another thing that adds to the beauty of these mansions is the
splendid setting in which they arelocated. For example, as we see in
many descriptions, some mansions are surrounded by greenery and stand
over or near water.
He will have a very pleasant life in an elevated Garden. (Surat al-Haqqa: 21-22)
In addition, there is another characteristic ofthese mansions in the Garden:
There are mansions made of emeralds and jewels. (Imam Ghazzali, Ihya
Ulum ad-Din [The Revival of the Sciences of the Deen]
Everything has been created in the Garden according to what people
desire and nothing they wish to seeis withheld from their eyes. Allah
reveals this inthe Qur'an:
… They will have there all that their hearts desire and their eyes
find delight in… (Surat az-Zukhruf: 71)
On the Day you see themen and women of the believers, with their light
streaming out in front of them, and to their right:"Good news for you
today of Gardens with rivers flowing under them, remaining in them
timelessly, for ever. That is the Great Victory." (Surat al-Hadid: 12)