The Yemeni Corner of the Ka’bah
Question

                My question is regarding The Holy Kabaa, i went for Umrah two years ago and luckily i peform the tawaf very close to the walls of Kabaa. To my astonishemnt I saw that the Yemeni side of Kabba had a strange stone like object with marks on it. I wish to know what this object is, what is the name of it, and are we allowed to kiss it, the same way we kiss the Black stone.
Praise be to Allah.In the book al-Taareekh al-Qadeem li Makkah wa 
    Bayt-Allaah il-Kareem (The Ancient History of Makkah and the Noble House of Allaah) by Muhammad Taahir al-Kurdi al-Makki (vol. 3, p. 256), it 
    says that the stone in the Yemeni Corner (al-Rukn al-Yamaani) goes back to the time when ‘Abd-Allaah ibn al-Zubayr (may Allaah be pleased with 
    him) rebuilt the Ka’bah, and that it has remained until our own times, and that everyone who has rebuilt the Ka’bah kept this stone as it was. He 
    says that in 1040 AH, during the time of Sultan Murad IV, who rebuilt the Ka’bah, the edge of the stone of this Corner was broken off, and molten 
    lead was poured in its place, and before that the pieces of the stone had been put together, using adhesive and nails, during the era of the 
    Fatimids. 
Perhaps what you saw was that lead or the marks of 
    those nails, with changes in its colour because of perfume or being touched by the hands of people doing Tawaaf. 
What is prescribed is to touch this corner, 
    without kissing it or saying Allaahu akbar. If you cannot touch it then you should not point to it, because that was not narrated from the Prophet 
     (peace and blessings of Allaah be upon him). 
Shaykh Ibn ‘Uthaymeen (may Allaah have mercy on 
    him) said: 
The Messenger  (peace and blessings of Allaah 
    be upon him) used to touch the Yemeni Corner, but he did not say Allaahu akbar. So based on this it is not Sunnah to say Allaahu akbar when 
    touching it. 
Al-Sharh al-Mumti’, 
    7/283. 
Shaykh al-Albaani (may Allaah have mercy on him) 
    said: 
(The pilgrim) touch the Yemeni Corner with his 
    hand in each circuit (of Tawaaf), but he should not kiss it. If it is not possible to touch it, then he should not point to it with his hand. 
Manaasik al-Hajj wa’l-‘Umrah, 
    p. 22 
Touching it is indicated by the hadeeth narrated by al-Haakim from Ibn ‘Umar, according to 
    which, when the Messenger of Allaah  (peace and blessings of Allaah be upon him) circumambulated the Ka’bah (Tawaaf), he would touch the Black 
    Stone and the Yemeni Corner in each circuit. 
Saheeh al-Jaami’, no. 
    4751.  
Concerning the virtue of touching the Yemeni 
    Corner, the Prophet  (peace and blessings of Allaah be upon him) said: “Touching the Black Stone and the Yemeni Corner indeed erases sins.” 
    (Narrated by Ahmad from Ibn ‘Umar; classed as saheeh by al-Albaani in Saheeh al-Jaami’, no. 2194). 
And Allaah knows best.