GEMSTONE AND DECORATIVE MATERIALS

Question 1

When was the discovery of gemstone resources in the Philippines?

Answer 1

1982

Question 2

the discovery of gemstone resources in the Philippines can be traced back to significant finds in _ and ___.

Answer 2

Sibalom and San Remigio, Antique, and in San Joaquin, Iloilo

Question 3

the 1982 discovery of gemstone set the stage for the subsequent establishment of a small-sclae gemstone industry in -______.

Answer 3

Aklan, Panay Island

Question 4

Noteworthy endeavor in this development (gemstone resources in the Philippinnes) happened _____

Answer 4

January 1996 to December 1998

Question 5

True or False: The country’s exports of semi-precious and precious cut gemstones remain comparatively low, suggesting a greater reliance on imported gemstones for local consumption and industry needs.

Answer 5

true

Question 6

Gemstone deposits in the Philippines are categorized into two which are? These categories are also based on their ____, ____, and ___ .

Answer 6

Primary and Secondary types based on their origin, formation and deposition.

Question 7

these type of gemstone deposits are found in the locations where they originally formed (in situ) and are associated with the rocks in which they have crystallized. These deposits can occur as disseminations, veins, dikes, lenses, or beds within various rock types.

Answer 7

Primary deposits

Question 8

these type of gemstone deposits are located away from their original formation sites. They are typically found in alluvial or riverbed, flood plain, or beach deposits. These secondary deposits can appear as narrow patches, lenses of various sizes, or as evenly distributed materials in the alluvial environments.

Answer 8

Secondary deposits

Question 9

In the market , gemstones are further divided into precious and semi-precious categories, based on their ____ and _____

Answer 9

value and rarity

Question 10

what are the classic precious stones?

Answer 10

diamond, ruby, sapphire, and emerald.

Question 11

The classic precious stones are highly valued for their ___, ___ and _____

Answer 11

beauty, durability and rarity

Question 12

In the Philippines, ____ stones are more commonly found.
a. precious
b. Semi precious

Answer 12

B. semi-precious

Question 13

Zambales Jade is located in ______

Answer 13

Sta. Cruz, Zambales

Question 14

Zambales jade features layered ultramafic rocks such as

Answer 14

dunite, peridotite and gabbro

Question 15

zambales jade is found in (—–), characterized by minerals such as _, , _, and

Answer 15

ultramafic/ophiolitic suites
uvarovite, mauve blue schist, jasper/chert, and serpentine

Question 16

Mindoro Jade is located in _____.

Answer 16

Occidental Mindoro, particularly along Pagbahaan River

Question 17

The area of Mindoro Jade, part of the Mindoro Metamorphics is rich in ____, ____ and _____

Answer 17

mica schist, greenschist and gneiss

Question 18

Mindoro Jade deposit is significant for its — carrying a distinct greenish-gray hue, indicative of its rich mica content

Answer 18

parallel quartz veins within limestone.

Question 19

These deposits are distributed across various provinces including ilocos norte, and masbate often in volcanic and pyroclastics settings. The material is known for its red to reddish-brown color and granular texture

Answer 19

Jasper/Chert and Opal Deposits

Question 20

______ host a notable jasper deposit utilized both as a gemstone and an industrial material

Answer 20

Dasol, Pangasinan

Question 21

Jasper/Chert and Opal deposits are underlain by _______ and ____, where the jasper forms discontinuous lenses or fills fractures in volcanic substrates

Answer 21

volcanic rocks and limestones

Question 22

In Burgos, Ilocos Norte, the moss opal deposit is found within the _____ , composed of ____ and _____.

Answer 22

found within the Bojeador Formation, composed of andesite and tuffs.

Question 23

the tektite deposits in Camarines Norte are known locally as ____

Answer 23

bisnu

Question 24

Tektite deposits are believed to have formed from _____

Answer 24

meteoritic impacts

Question 25

tektite deposits which are glassy stones, vary in color from ______

Answer 25

black to brown and olive green

Question 26

Obsidian deposits are found in _____

Answer 26

Nagcarlan, Laguna at the lower ridges of Mount Tangob

Question 27

The gemstone industry faces several challenges: name three

Answer 27

(1) lack of comprehensive data
(2) import dependence
(3) small-scale industry nature