Jer 17:1 is written with .. and with d point
Zec 7:12 they set their hearts as d, lest
Diamond (Heb. Y>hal^m, sh>mTr). Crystallized carbon, the hardest of minerals (10 on the Mohs scale). It is highly prized as a jewel because of its brilliance and luster, and as a tool or abrasive because of its extreme hardness. However, the Hebrew terms do not designate the diamond, which was not known in OT times; any translation is purely conjectural. It was the 3rd stone of the 2nd row of the high priest’s breastplate (Exo 28:18; 39:11), and one of the precious stones that adorned the “king of Tyre” (Eze 28:13, “jasper” in KJV ). Sh>mîr is probably emery or corundum.*
Source: Evangelical Bible Dictionary
Greek adamas, indomitable. Precious stone formed by crystallized carbon, the brightest, hardest and clearest of all minerals. The D. it was in the second row of the precious stones that the breastplate of the judgment of the priests wore, Ex 28, 18; 39, 11.
The D. It is used for its hardness, to engrave fine stones. In this sense, figuratively, the prophet Jeremiah says that the sins of Israel are engraved on his heart with a point of d., Jr 17, 1. In the vision of the prophet Ezekiel, God tells him that he will make his forehead as hard as the d ., Ez 3, 9.
While the prophet Zechariah affirms that the Israelites hardened their hearts like the d., Ze 7, 12.
Digital Bible Dictionary, Grupo C Service & Design Ltda., Colombia, 2003
Source: Digital Bible Dictionary
All the city of heaven is made of diamond: Rev 21:18, Rev 21:21.
E1 pectoral of the priest deb
Christian Bible Dictionary
Dr. J. Dominguez
http://bible.com/dictionary/
Source: Christian Bible Dictionary
The most esteemed of precious stones (Job 28:17). It is a crystallized carbon, diaphanous and of great brilliance. Most of the time it is transparent. One of the stones in the high priest’s breastplate was a d. (Exo 28:18). A special feature is its hardness, which allows it to cut all other minerals. That is why it is used as a figure saying: “The sin of Judah is written with an iron chisel and with a d point” (Jer 17:1), and that God made Ezekiel “like a d, stronger than flint” ( Eze 3:9). Likewise, it is said that the children of Israel † œset his heart as d., so as not to hear the law † (Zech 7:12). The d., although known in Israel, was imported from other lands, mainly from India. †¢Precious stones.
Source: Christian Bible Dictionary
type, PIED
vet, (a) Heb. “yahalom”. It appears in Ex. 28:18; 39:11; cannot be identified. In Ez. 28:13 is translated “jasper” in the 1960 and 1977 revisions, while in the old it is translated “diamond.” (b) It only appears in the passages quoted, and cannot be truly identified. It is generally held that it is not what is now known as a diamond. (c) In Jer. 17:1 and Ez. 3:9 the term is “shamir.” It is believed to be corundum, a stone of great hardness, but since it has different colors it now has several names.
Source: New Illustrated Bible Dictionary
The hardest natural mineral known. This brilliant gem is among the most valuable gemstones. Although diamonds are generally colorless, some have shades of yellow, green, red, brown, blue or black. Most uncut diamonds are eight-sided transparent or translucent crystals composed of nearly pure carbon. Diamonds are believed to have formed when coal on Earth was subjected to great pressure and heat in ancient times. The earliest were found in riverbeds, but in modern times they are usually mined from subsurface rock formations.
The Hebrew word scha·mír (translated twice “diamond” and once “emery stone” in NM) seems to be related to the Akkadian word ashmur, meaning “emery.” Some believe that scha·mír may correspond to a very hard mineral, vaguely identified by the Greek term a·da·mas (meaning “invincible”), which may refer to diamond or other very hard substances, such as corundum and the emery.
Jehovah referred to the diamond as a means of scratching or engraving hard materials, saying: “The sin of Judah is written in an iron style. With a diamond point it is engraved on the tablet of his heart, and on the horns of his altars †. (Jer 17:1, 2) As the house of Israel also became stubborn and insensitive, Jehovah said to Ezekiel: “Look! I have made your face exactly as hard as their faces, and your forehead exactly as hard as their foreheads. Like a diamond, harder than flint, I have made your forehead† . (Eze 3:7-9) Likewise, because of the stubbornness of the Jews, Jehovah told Zechariah: “They set their hearts as an emery stone so as not to obey the law and the words that Jehovah of armies sent for his spirit, through the former prophets† . (Zech 7:12; see JEWELS AND PRECIOUS STONES.)
Source: Dictionary of the Bible