What Are The Key Properties And Care Methods For Popular Jewelry Materials.pptx

Hey there, jewelry lovers! Ever wondered how to keep your sparkly pieces in tip-top shape? This presentation’s got you covered with all the juicy details on the key properties and care methods for popular jewelry materials. Let’s dive in!
First up, precious metals. Gold is a classic choice, available in yellow, white, and red. It’s durable and can be worn every day. Platinum is super rare and hypoallergenic, making it perfect for sensitive skin. Silver is affordable and versatile, but it can tarnish, so keep it polished!
Then there’s jade. Hetian jade is the cream of the crop, known for its smooth texture and rich history. It comes in various colors, from pure white to vibrant green. Fun fact: white nephrite is super rare and highly valued. Care tip: keep it away from heat and clean it gently.
Gemstones are another story. Diamonds are forever, right? Well, they’re also super hard and can handle a lot, but they need a good clean now and then. Rubies and sapphires are colorful and tough, but avoid harsh chemicals. Tourmalines come in a rainbow of colors and need a bit of extra care to keep them looking their best.
Don’t forget organic gems! Pearls are delicate and need to be stored separately to avoid scratches. Amber is fossilized tree resin and can have cool inclusions like bugs or plants. It’s soft, so handle with care.
So, whether you’re a jewelry store owner, a designer, or just someone who loves to wear beautiful pieces, knowing how to care for your jewelry can make all the difference. Keep your gems shining and your metals gleaming!

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2. 1. Precious Metals Common Jade Stones 2. CONTENTS 3. Common Gemstones Common Organic Gemstones 4.

3. 01 Precious Metals

4. Gold Physical Properties Gold is a dense, malleable, and ductile yellow metal with high thermal and electrical conductivity, characterized by low Mohs hardness. Chemical Properties Gold (Au) is highly stable and corrosion-resistant, insoluble in most acids but soluble in aqua regia, and forms an amalgam with mercury. Classification Gold jewelry is classified by purity (in Karats), ranging from 9K to 24K, and includes variations like 3D hard gold and 18K gold alloys for enhanced properties and color. Care & Maintenance Gold jewelry requires careful maintenance to avoid chemical discoloration, abrasive damage, and should be cleaned with mild solutions and stored separately. Gold Bracelet Gold Hair Crown Pure gold pendant Pure gold bracelet Yellow, white, and red K gold bracelets (Provided by Yuehao Jewelry)

5. Platinum Physical Properties Platinum is a dense, silvery-white metal with high malleability, excellent conductivity, and a significantly higher melting point and hardness than gold. Chemical Properties Platinum (Pt) is a highly stable and corrosion-resistant metal, insoluble in common acids and bases but soluble in aqua regia, ensuring it is tarnish-resistant. Classification Platinum jewelry is hallmarked based on its millesimal fineness (e.g., Pt950, Pt900), denoting the parts per thousand of pure platinum, and does not use the Karat system. Care & Maintenance To preserve its finish, platinum jewelry should be protected from scratches, periodically cleaned with a mild solution, and can be re-polished by a professional to restore its luster. Platinum Bracelet (Provided by Yuehao Jewelry)

6. Silver Physical Properties Silver is a soft, malleable, white metal with high ductility and a Mohs hardness slightly higher than gold. Chemical Properties Silver (Ag) is relatively stable but reactive among precious metals, dissolving in certain acids and tarnishing to form silver sulfide when exposed to atmospheric sulfur. Classification Silver jewelry is classified by fineness, such as Sterling (≥990‰) and 925 Silver, and includes variants like Thai Silver and Tibetan Silver with distinct finishes and compositions. Care & Maintenance Silver jewelry requires proper storage in sealed bags and specific cleaning methods to prevent and remove sulfide-induced tarnishing. Silver bangle Silver pendant Silver bracelet Silver bracelet after oxidizing and turning black

7. Palladium Physical Properties Palladium is a white, lustrous metal with good ductility, a hardness higher than platinum, and a significantly lower density. Chemical Properties Palladium (Pd) is corrosion-resistant but is soluble in strong acids like sulfuric and nitric acid, unlike the more inert platinum. Care & Maintenance Palladium jewelry requires separate storage to avoid scratches and should be cleaned regularly, with professional polishing to restore its finish if needed.

8. 02 Common Jade Stones

9. Jadeite Jadeite Bean Pod Pendant Jadeite Blessing Melon Charm Jadeite Guanyin Bodhisattva Statue Cultural Themes Jadeite carvings predominantly feature culturally significant motifs like Guanyin, Buddha, Pi Huan Kou and Bracelet (Common jadeite bracelet styles include the perfectly round Fu Tiao, the flat-oval Fei Tiao, and the flat-inner-circle Ping An Tiao.) symbolizing protection, blessing, and auspiciousness in traditional Chinese culture. Quality Assessment Jadeite quality is primarily evaluated by its color saturation/vividness, clarity/transparency, and the fineness/consistency of its texture or "base." Care & Maintenance Jadeite requires protection from high temperatures, chemical corrosion, and physical impact to preserve its luster and structural integrity.

10. Hetian Jade Colour Characteristics Legend White Jade White nephrite, of which the best is sheepskin white (like congealed grease), is unique to Hetian jade. The quantity of white nephrite is very small and its value is very high. Most of the Hetian white jade is general white jade, but white jade should be white and warm, if white but not moist, it is dead white, not the best jade.   White jade A soft jade that lies between white jade and green jade, resembling white but not white, and resembling green but not green. This name was used by the ancients.   Greenish white jade Traditionally, green jade is dark green with grey or green with black, and is the hardest of the nephrite, but not as beautiful in colour as white jade, and of lower value than white jade.   Jasper Green to dark green nephrite, sometimes black spots can be seen, its green parrot green, pine green, ginkgo nut green. Good jasper colour like jade, ancient women often jasper for headdress, ‘jasper hairpin’ story is an example.   Introduction to Hetian Jade Hetian jade, the finest nephrite sourced primarily from Xinjiang, China, is renowned for its greasy luster, warm feel, and deep cultural significance dating back to the Neolithic era.

11. Hetian Jade Colour Characteristics Legend Topaz Pale yellow, sweet yellow to yellow flashing green nephrite, also known as beeswax yellow, chestnut yellow, okra yellow, yellow flower yellow, egg yellow, beige yellow, yellow poplar yellow, etc., rare for the steamed corn yellow, beeswax yellow. Topaz is generally lighter in colour, bright yellow, and extremely rare in its richness. High-quality topaz is not inferior to white goat's fat, but it is not the ‘yellow jade’ or ‘topaz crystal’ of gemstones.   Nephrite It is grey to black, coloured by graphite, with no less than 30% black, and its luster is duller than that of other jades. Its black distribution is either dotted, cloudy or pure black, with names such as dark cloud flake, light ink, golden sable beard, lady's sideburns, pure lacquer black, etc., mixed with green or even white, of which the black of nephrite is caused by microscopic scale-like graphite.   Sugar Jade Blood-red, red-sugar-red, purple-red, and maroon nephrite, of which blood-red sugar-red nephrite is the best, is mostly subordinate to white and green nephrite.   Emerald Green Jade Part or the whole of the colour tone is light green or emerald green, the percentage of green part is not less than 5%, common green and white, green and white and smoky green and other colour combinations.   Introduction to Hetian Jade Hetian jade requires protection from heat and dehydration, should be gently cleaned with a soft brush and mild detergent, and must be safeguarded from impacts to prevent internal damage.

12. 03 Common Gemstones

13. Diamond Origin & Rarity Diamonds form under extreme conditions; their rarity is underscored by the immense ore volume required for a single carat, with famous rough stones like the Cullinan yielding multiple polished gems after meticulous cutting. Grading (4Cs) Diamond quality is systematically evaluated by the 4Cs: Carat weight, Clarity (inclusion visibility), Color (graded from colorless to tinted), and Cut (proportions and finish that maximize brilliance and fire). Care & Maintenance Due to their hardness and oleophilic nature, diamonds require separate storage to prevent scratching other gems, along with regular cleaning to maintain brilliance and periodic prong checks to ensure security. Diamonds of Different Colors Diamonds of various cuts

14. Diamond Hope Blue Diamond Cullinan No. 1 Changlin Diamond (the largest natural diamond currently in China) A Soviet mine rich in diamond deposits Rough diamonds High-Quality Cut Ordinary Cut Poor Cut

15. Ruby Pigeon Blood Ruby Faceted Ruby Star Ruby Symbolism & Lore Ruby, the July birthstone, is historically revered as the "Stone of Love," symbolizing passion and possessing a rich lore of protection and power. Rarity & Grading Ruby value is primarily determined by color saturation and purity, with large, high-quality gemstones being exceptionally rare due to low geological yield. Gemological Properties As a corundum variety, ruby is distinguished by its red color, exceptional hardness (9 on the Mohs scale), and rare, highly-valued "pigeon's blood" hue. Cut & Carat Rubies are commonly faceted in oval and round brilliant cuts to maximize their color and brilliance, with value increasing significantly with carat weight due to scarcity in larger sizes.

16. Sapphire Gemological Family Sapphire is a gem-quality variety of the corundum species, encompassing all colors except red (which is ruby), with blue being the most prevalent. Rarity & Treatments While more abundant than ruby, large, high-quality sapphires are rare, and heat treatment is a common and accepted practice to enhance color, though it affects value relative to untreated stones. Color Varieties & Value The value of a sapphire is predominantly determined by its color, with highly saturated hues like "cornflower blue," "royal blue," and the rare " padparadscha " orange-pink commanding significant premiums. Care & Maintenance Due to their high hardness (9 on the Mohs scale) and potential cleavage, sapphires require separate storage from other gems and protection from sharp impacts. Cornflower blue sapphire Royal blue sapphire Pink-orange lotus and Padparadscha Sapphires of Various Colors

17. Tourmaline Gemological Properties Tourmaline is a complex crystalline boron silicate mineral valued for its wide pleochroic color range and pyroelectric properties. The world’s 50%~70% colored tourmaline comes from Brazil. Clarity & Treatments Most tourmaline contains characteristic inclusions; high-clarity specimens are rare, and resin-filling is a common treatment for fissured material to improve durability. Color Varieties & Value Value is primarily determined by color, with rare, copper-bearing "Paraiba" tourmaline at the premium end, followed by saturated reds, while bicolor varieties like "watermelon" are also prized. Care & Maintenance Due to its brittleness and potential cleavage, tourmaline requires protection from impacts, sharp temperature changes, and should not be cleaned in ultrasonic cleaners. Various Colors of Tourmaline Paraiba tourmaline Bicolor Tourmaline High-quality tourmaline Tourmaline with many fissures and filled with colored resin

18. 04 Common Organic Gemstones

19. Pearl Origin & Types Pearls are primarily cultured and categorized by water type (saltwater vs. freshwater), with key varieties including Akoya, South Sea, and Tahitian pearls. Quality Factors Pearl quality is graded based on the primary factors of luster, nacre thickness, surface cleanliness, shape (roundness), size, and color/overtone. Care & Maintenance As organic gems composed of calcium carbonate, pearls require protection from chemicals, abrasion, and dehydration, and need periodic restringing and careful storage.

20. Pearl Pearls of Various Colors Pearls of Various Sizes The roundness of pearls The luster of pearls Pearls with Flaws

21. Amber Amber with Plant Debris Beeswax Cherry amber Insect-inclusion amber Blue amber Origin & Formation Amber is a fossilized organic resin, primarily sourced from the Baltic region and Myanmar, valued for its inclusions of ancient flora and fauna. Classification & Varieties Amber is categorized by transparency (transparent amber vs. opaque beeswax) and prized varieties like cherry, blue (fluorescent), and insect-inclusion amber. Care & Maintenance As a soft, organic gem, amber requires protection from abrasion, high temperatures, and chemicals, and can be gently cleaned with warm water and occasionally oiled to maintain luster.

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