Sample 23Streak: WhiteRelative Hardness Material Mineral Scratched Fingernail No 2.5 Copper Coin No 3.2 Knife Blade No 5.1 Window Glass No 5.5 Steel File No 6.5 Breakage: See question belowMineral Color: Colorless or white, yellow, red, purple, brown, gray, etc. or other colors due to impuritiesSpecific Gravity: 2.65 - Density lowOther Properties: N/AWhat is the luster of this mineral? A.Metallic luster B.Nonmetallic luster 1 points QUESTION 75Sample 23: What is the observed breakage pattern?(Look at the lowest two photograph to determine how the material breaks) A.One plane of perfect cleavage B.Two planes of cleavage at 90o C.Two planes of cleavage at 60o and 120o D.Three planes of cleavage at 90o Cubic cleavage block E.Three planes of cleavage not at 90o Rombohedral cleavage block F.Fracture - conchoidal 1 points QUESTION 76Sample 23:What is the name of this mineral? A.Orthoclase B.Calcite C.Microcrystalline quartz (chalcedony) D.Garnet E.Quartz F.Olivine 1 points QUESTION 77Sample 23:What are the uses of this mineral? A.Gemstone B.Arrowheads, spearpoints C.Glass D.Abrasive E.All of the above **Title: Understanding Agate and Quartz Crystals****Introduction:**This image showcases a beautifully polished slice of an agate geode. Agate is widely renowned for its strikingly colorful bands and layers. The detailed annotations in the image highlight specific features of this stunning specimen.**Annotated Points:**1. **Specimen 23:** - The image is labeled "Specimen 23," indicating that this particular agate geode is part of a larger collection, presumably for educational or research purposes.2. **Quartz Crystals:** - The innermost section of the agate geode is pointed out as containing "Quartz crystals." Here, the quartz crystals have formed in the central cavity of the geode, a common characteristic of agate structures. These crystals are typically clear or white, but can occasionally appear in different colors due to impurities.**Description of the Agate Geode:**- **Banding Patterns:** The sliced agate exhibits distinctive, concentric banding patterns. The bands range in color from neutral tones to rich blues and browns. These patterns are a result of the deposition of silica from groundwater in hollow cavities of volcanic rocks.- **Geode Composition:** The outer bands are formed first, with successive layers being deposited inward. Eventually, the central cavity may become filled with quartz crystals as is evident in this specimen.- **Formation Process:** Agates form when groundwater carrying silica (from decomposed volcanic ash) moves through a rock cavity. Over time, silica is deposited in layers, creating the banded patterns. The central cavity remains, slowly allowing quartz crystals to grow within it.**Conclusion:**This polished slice of an agate geode (Specimen 23) provides a visual insight into the intricate natural processes that create such geological wonders. The clear quartz crystals at the center add to the specimen's beauty and serve as an excellent example of how agates and quartz can coexist in nature. Examining such specimens can help students and enthusiasts understand the complexity and beauty of geological formations.

Since you have posted multiple questions, we will provide the solution only to the first…

Answered: Streak: White Relative Hardness…

9th Edition

ISBN:9780134746241

Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa

Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa

Chapter1: The Study Of Minerals

Section: Chapter Questions

Problem 1LR

Sample 23:

What is the observed breakage pattern?

(Look at the lowest two photograph to determine how the material breaks)

	A.	One plane of perfect cleavage
	B.	Two planes of cleavage at 90^o
	C.	Two planes of cleavage at 60^oand 120^o
	D.	Three planes of cleavage at 90^oCubic cleavage block
	E.	Three planes of cleavage not at 90^o Rombohedral cleavage block
	F.	Fracture - conchoidal

1 points

Sample 23:

What is the name of this mineral?

A.

Orthoclase

B.

Calcite

C.

Microcrystalline quartz (chalcedony)

D.

Garnet

E.

Quartz

F.

Olivine