Now, amongst all the verses that mention the word "Moon" in the Quran, one of them ends with an Elif, meaning one of them is 4 letters in total instead of 3 :

وَقَمَرًا

We have the word Moon here. But without the prefix, meaning counting only the word Moon, we have 4 letters here because of the Elif at the end. The rest of the verses which have the word Moon within don't have an Elif at the end, this is the only one.

This happens in chapter 25 verse 61. Here's what the verse says :

"Blessed is the One Who has placed constellations in the sky, as well as a ˹radiant˺ lamp and a luminous moon." - 25:61

So why is this interesting? Well, because it's also the only verse that mentions the word Moon this way : وَقَمَرًا :

تَبَارَكَ ٱلَّذِى جَعَلَ فِى ٱلسَّمَآءِ بُرُوجًۭا وَجَعَلَ فِيهَا سِرَٰجًۭا وَقَمَرًا مُّنِيرًۭا

The 10th word is the word Moon.

And the gematrical value of this word, is 347. Since we have 4 letters uniquely here due to the Elif, instead of 3, we add 4 at the end : 3474. And we have the diameter of the Moon. Or, since the word is the 10th word of the verse, 347×10 = 3470, +4 = 3474.

Furthermore, what is total gematrical values of the verse entire? 3018. Why is this interesting?  3018 is what's right in-between 2561 and 3474. The number of the chapter put side to side along with the number of the verse is 2561 obviously (25:61). So, let's do some math :

2561+3474 = 6035. Half of this = 3017.5

So, it's perfectly placed in the Quran to obtain the diameter of the Moon.

It's perfectly placed moreover because of the fact that when 2561 is read backwards we have 1652. Let's do some math :

2561-1652 = 909

2561+909 = 3470, +4 = 3474

BUT most importantly, this particular verse is the 2916th verse of the Quran. Half of this number is 1458. We explain on the page Distance between the Earth and the Moon this in details, how the numbers 18 or 81 are specially interesting regarding the Moon in the Quran, for instance 54÷3 = 18 (3 is the total amount of letters in the word 'Moon', chapter 54 is called The Moon), 27×3 = 81, and 27×54 = 1458, or 18×81 = 1458, and counting up to 54 by adding up digit after digit, meaning 1+2+3+4 etc.. up to 54, we obtain 1485, minus 27 = 1458. 1+4+5+8 = 18, 2+9+1+6 = 18, 54×54 = 2916.

Also, this verse has 11 words, and 47 letters in total. For some reason, 3 verses in total in this chapter have that amount of letters and words : verse 61, verse 65 and verse 67, all after verse 61. 11 and 47 put together : 1147.

1147+1147+1147 = 3441

11×3 = 33

3441+33 = 3474

As for the 47, 47×3 = 141. Total occurences of the word Moon : 27, in 26 verses, in 23 chapters. 

272,623×1.41 = 384,398.43, this is the average distance between Earth and the Moon (384,399km/384,400km). But we go in details on the page Distance between the Earth and the Moon

We have about the same encouter with the word أَرْضَ (Earth), albeit in a different yet uniquely amazing way.

This word ('Earth') is mentioned 461 times in the Quran, and amongst all these verses, the closest to the Earth's diameter, which is 12,742 km, when the number of the chapter and the verse are taken and put together side to side, is definitely chapter 12 verse 73. Now the position of the word 'Earth' in this verse is the 9th word. When all these numbers are put together side to side, we have 12,739. 

The word 'Earth' in Arabic is 3 letters in total, we'd add 3 and we get 12,742. But this is not to say that this is a crazy encounter or something, because the word itself is mentioned 461 times to begin with! So obviously this would technically be nothing but a coincidence, and this is a fact of course, I mean if the word Earth with this specific triliteral root was mentioned only once, and here, then it could in no way be a coincidence. But is there something else perhaps here? I'll explain down below my knowledge of this situation.

When I took a closer look at this, and analyzed it like I always do, I found a phenomenon. For me to explain it, first we need to understand that 461 read backwards is 164, and that this number is not randomly made up either since it is quite significant in the Quran, like for instance the first verse to ever mention the words cloud, animals and wind is chapter 2 verse 164, or the word sperm-drop is first mentioned in chapter 16 verse 4, (the word also means "land" or "earth", "soil") etc. 

Now that this is said, to understand better why we had to add 3 in order to get the diameter of the Earth, which is the total amount of letters in the word 'Earth" in Arabic, which is mentioned 461 times in the Quran, we need to know that amongst all the verses which mention the word 'Earth', one of them only, when we do the same thing as earlier, meaning we take the number of the chapter and the verse, is divisable by the position of the word 'Earth' in the verse which then equals 461 ; this happens in 32:27, the 7th word of the verse is 'Earth', and 3227÷7 = 461, but what is the correlation between this and the other verse that makes up the diameter of the Earth (12:73)? Well, guess how many times is the word 'Earth' (أَرْضَ) mentioned from 12:73 up to 32:27 : 164 times exactly!

Nothing here can be considered as mere coincidences.